According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in fs/fuse/fuse_i.h in the     Linux kernel before 5.11.8. A 'stall on CPU' can occur     because a retry loop continually finds the same bad     inode, aka CID-775c5033a0d1.(CVE-2021-28950)

  - An issue was discovered in the Linux kernel before     5.8.10. virt/kvm/kvm_main.c has a     kvm_io_bus_unregister_dev memory leak upon a kmalloc     failure, aka CID-f65886606c2d.(CVE-2020-36312)

  - An issue was discovered in the Linux kernel before 5.9.
    arch/x86/kvm/svm/sev.c allows attackers to cause a     denial of service (soft lockup) by triggering     destruction of a large SEV VM (which requires     unregistering many encrypted regions), aka     CID-7be74942f184.(CVE-2020-36311)

  - An out-of-bounds (OOB) memory access flaw was found in     fs/f2fs/node.c in the f2fs module in the Linux kernel     in versions before 5.12.0-rc4. A bounds check failure     allows a local attacker to gain access to out-of-bounds     memory leading to a system crash or a leak of internal     kernel information. The highest threat from this     vulnerability is to system availability.(CVE-2021-3506)

  - An out-of-bounds (OOB) memory write flaw was found in     list_devices in drivers/md/dm-ioctl.c in the     Multi-device driver module in the Linux kernel before     5.12. A bound check failure allows an attacker with     special user (CAP_SYS_ADMIN) privilege to gain access     to out-of-bounds memory leading to a system crash or a     leak of internal kernel information. The highest threat     from this vulnerability is to system     availability.(CVE-2021-31916)

  - An issue was discovered in the Linux kernel through     5.2.13. nbd_genl_status in drivers/block/nbd.c does not     check the nla_nest_start_noflag return     value.(CVE-2019-16089)

  - The bpf verifier in the Linux kernel did not properly     handle mod32 destination register truncation when the     source register was known to be 0. A local attacker     with the ability to load bpf programs could use this     gain out-of-bounds reads in kernel memory leading to     information disclosure (kernel memory), and possibly     out-of-bounds writes that could potentially lead to     code execution. This issue was addressed in the     upstream kernel in commit 9b00f1b78809 ('bpf: Fix     truncation handling for mod32 dst reg wrt zero') and in     Linux stable kernels 5.11.2, 5.10.19, and     5.4.101.(CVE-2021-3444)

  - An issue was discovered in the Linux kernel through     5.11.x. kernel/bpf/verifier.c performs undesirable     out-of-bounds speculation on pointer arithmetic,     leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from     kernel memory. Specifically, for sequences of pointer     arithmetic operations, the pointer modification     performed by the first operation is not correctly     accounted for when restricting subsequent     operations.(CVE-2021-29155)

  - kernel/bpf/verifier.c in the Linux kernel through     5.12.1 performs undesirable speculative loads, leading     to disclosure of stack content via side-channel     attacks, aka CID-801c6058d14a. The specific concern is     not protecting the BPF stack area against speculative     loads. Also, the BPF stack can contain uninitialized     data that might represent sensitive information     previously operated on by the kernel.(CVE-2021-31829)

  - net/bluetooth/hci_request.c in the Linux kernel through     5.12.2 has a race condition for removal of the HCI     controller.(CVE-2021-32399)

  - In the Linux kernel before 5.12.4,     net/bluetooth/hci_event.c has a use-after-free when     destroying an hci_chan, aka CID-5c4c8c954409. This     leads to writing an arbitrary value.(CVE-2021-33034)

  - The Linux kernel before 5.11.14 has a use-after-free in     cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the     CIPSO and CALIPSO refcounting for the DOI definitions     is mishandled, aka CID-ad5d07f4a9cd. This leads to     writing an arbitrary value.(CVE-2021-33033)

  - Use After Free vulnerability in nfc sockets in the     Linux Kernel before 5.12.4 allows local attackers to     elevate their privileges. In typical configurations,     the issue can only be triggered by a privileged local     user with the CAP_NET_RAW capability.(CVE-2021-23134)

  - A memory leak vulnerability was found in Linux kernel     in llcp_sock_connect(CVE-2020-25672)

  - A vulnerability was found in Linux Kernel, where a     refcount leak in llcp_sock_connect() causing     use-after-free which might lead to privilege     escalations.(CVE-2020-25671)

  - A vulnerability was found in Linux Kernel where     refcount leak in llcp_sock_bind() causing     use-after-free which might lead to privilege     escalations.(CVE-2020-25670)

  - kernel/bpf/verifier.c in the Linux kernel through     5.12.7 enforces incorrect limits for pointer arithmetic     operations, aka CID-bb01a1bba579. This can be abused to     perform out-of-bounds reads and writes in kernel     memory, leading to local privilege escalation to root.
    In particular, there is a corner case where the off reg     causes a masking direction change, which then results     in an incorrect final aux->alu_limit.(CVE-2021-33200)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1977-1 advisory.

  - An issue was discovered in the Linux kernel through 5.3.9. There is a use-after-free when aa_label_parse()     fails in aa_audit_rule_init() in security/apparmor/audit.c. (CVE-2019-18814)

  - In the Linux kernel 5.3.10, there is a use-after-free (read) in the perf_trace_lock_acquire function     (related to include/trace/events/lock.h). (CVE-2019-19769)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a     network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP,     CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.
    (CVE-2020-24586)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary     can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP,     CCMP, or GCMP encryption key is periodically renewed. (CVE-2020-24587)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated.
    Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an     adversary can abuse this to inject arbitrary network packets. (CVE-2020-24588)

  - A vulnerability was found in Linux Kernel where refcount leak in llcp_sock_bind() causing use-after-free     which might lead to privilege escalations. (CVE-2020-25670)

  - A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-     free which might lead to privilege escalations. (CVE-2020-25671)

  - A memory leak vulnerability was found in Linux kernel in llcp_sock_connect (CVE-2020-25672)

  - A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak     and eventually hanging-up the system. (CVE-2020-25673)

  - An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other     clients even though the sender has not yet successfully authenticated to the AP. This might be abused in     projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier     to exploit other vulnerabilities in connected clients. (CVE-2020-26139)

  - An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation     does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can     abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-     confidentiality protocol. (CVE-2020-26141)

  - An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3     implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process     them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets     independent of the network configuration. (CVE-2020-26145)

  - An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble     fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject     packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP,     CCMP, or GCMP data-confidentiality protocol is used. (CVE-2020-26147)

  - An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-     of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects     pointer types that do not define a ptr_limit. (CVE-2020-27170)

  - An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error     (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to     side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory,     aka CID-10d2bb2e6b1d. (CVE-2020-27171)

  - An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users     can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.
    (CVE-2020-27673)

  - A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the     ability to set extended attributes to panic the system, causing memory corruption or escalating     privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system     availability. (CVE-2020-27815)

  - An out-of-bounds (OOB) memory access flaw was found in x25_bind in net/x25/af_x25.c in the Linux kernel     version v5.12-rc5. A bounds check failure allows a local attacker with a user account on the system to     gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information.
    The highest threat from this vulnerability is to confidentiality, integrity, as well as system     availability. (CVE-2020-35519)

  - An issue was discovered in the Linux kernel before 5.8. arch/x86/kvm/svm/svm.c allows a     set_memory_region_test infinite loop for certain nested page faults, aka CID-e72436bc3a52.
    (CVE-2020-36310)

  - An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a     denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering     many encrypted regions), aka CID-7be74942f184. (CVE-2020-36311)

  - An issue was discovered in the Linux kernel before 5.8.10. virt/kvm/kvm_main.c has a     kvm_io_bus_unregister_dev memory leak upon a kmalloc failure, aka CID-f65886606c2d. (CVE-2020-36312)

  - An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka     CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system     crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as     CVE-2021-28950. (CVE-2020-36322)

  - An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in     the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local     user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability     is to confidentiality, integrity, as well as system availability. (CVE-2021-20268)

  - Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to     elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local     user with the CAP_NET_RAW capability. (CVE-2021-23134)

  - An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine     the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI     subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at     /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in     drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the     pointer to an iscsi_transport struct in the kernel module's global variables. (CVE-2021-27363)

  - An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is     adversely affected by the ability of an unprivileged user to craft Netlink messages. (CVE-2021-27364)

  - An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have     appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can     send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a     Netlink message. (CVE-2021-27365)

  - An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the     netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of     changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior     of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
    (CVE-2021-28038)

  - An issue was discovered in the Linux kernel through 5.11.6. fastrpc_internal_invoke in     drivers/misc/fastrpc.c does not prevent user applications from sending kernel RPC messages, aka     CID-20c40794eb85. This is a related issue to CVE-2019-2308. (CVE-2021-28375)

  - rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6     allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases,     CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may     have situations in which a drivers/staging issue is relevant to their own customer base. (CVE-2021-28660)

  - The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use     uninitialized or stale values. This initialization went too far and may under certain conditions also     overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking     persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died,     leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable.
    XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

  - An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A stall on CPU can occur     because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1. (CVE-2021-28950)

  - An issue was discovered in the Linux kernel through 5.11.8. The sound/soc/qcom/sdm845.c soundwire device     driver has a buffer overflow when an unexpected port ID number is encountered, aka CID-1c668e1c0a0f. (This     has been fixed in 5.12-rc4.) (CVE-2021-28952)

  - A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It     allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer     before a cloning operation, aka CID-dbcc7d57bffc. (CVE-2021-28964)

  - In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some     Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS     status in a PEBS record is mishandled, aka CID-d88d05a9e0b6. (CVE-2021-28971)

  - In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has     a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing     userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and     remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8. (CVE-2021-28972)

  - BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements,     allowing them to execute arbitrary code within the kernel context. This affects     arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. (CVE-2021-29154)

  - An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable     out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer     arithmetic operations, the pointer modification performed by the first operation is not correctly     accounted for when restricting subsequent operations. (CVE-2021-29155)

  - An issue was discovered in the Linux kernel through 5.11.10. drivers/net/ethernet/freescale/gianfar.c in     the Freescale Gianfar Ethernet driver allows attackers to cause a system crash because a negative fragment     size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is     enabled, aka CID-d8861bab48b6. (CVE-2021-29264)

  - An issue was discovered in the Linux kernel before 5.11.7. usbip_sockfd_store in     drivers/usb/usbip/stub_dev.c allows attackers to cause a denial of service (GPF) because the stub-up     sequence has race conditions during an update of the local and shared status, aka CID-9380afd6df70.
    (CVE-2021-29265)

  - An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows     attackers to obtain sensitive information from kernel memory because of a partially uninitialized data     structure, aka CID-50535249f624. (CVE-2021-29647)

  - An issue was discovered in the Linux kernel before 5.11.11. The netfilter subsystem allows attackers to     cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h     lack a full memory barrier upon the assignment of a new table value, aka CID-175e476b8cdf.
    (CVE-2021-29650)

  - An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in     drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.
    (CVE-2021-30002)

  - net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI     controller. (CVE-2021-32399)

  - In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an     hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. (CVE-2021-33034)

  - kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic     operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel     memory, leading to local privilege escalation to root. In particular, there is a corner case where the off     reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
    (CVE-2021-33200)

  - A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is     corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an     integer overflow, A local attacker with a special user privilege may cause a system crash problem which     can lead to an availability threat. (CVE-2021-3428)

  - The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when     the source register was known to be 0. A local attacker with the ability to load bpf programs could use     this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and     possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in     the upstream kernel in commit 9b00f1b78809 (bpf: Fix truncation handling for mod32 dst reg wrt zero) and     in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101. (CVE-2021-3444)

  - A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice     into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest     threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions     before kernel 5.12-rc6 are affected (CVE-2021-3483)

  - The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size     was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel     and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (bpf, ringbuf: Deny     reserve of buffers larger than ringbuf) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (bpf: Implement BPF ring buffer and verifier     support for it) (v5.8-rc1). (CVE-2021-3489)

  - The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly     update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and     therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (bpf: Fix alu32 const     subreg bound tracking on bitwise operations) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (bpf: Verifier, do     explicit ALU32 bounds tracking) (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (bpf:Fix a     verifier failure with xor) ( 5.10-rc1). (CVE-2021-3490)

  - The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the     PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem.
    This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was     addressed via commit d1f82808877b (io_uring: truncate lengths larger than MAX_RW_COUNT on provide     buffers) (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was     introduced in ddf0322db79c (io_uring: add IORING_OP_PROVIDE_BUFFERS) (v5.7-rc1). (CVE-2021-3491)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1975-1 advisory.

  - An issue was discovered in the Linux kernel through 5.3.9. There is a use-after-free when aa_label_parse()     fails in aa_audit_rule_init() in security/apparmor/audit.c. (CVE-2019-18814)

  - In the Linux kernel 5.3.10, there is a use-after-free (read) in the perf_trace_lock_acquire function     (related to include/trace/events/lock.h). (CVE-2019-19769)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a     network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP,     CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.
    (CVE-2020-24586)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary     can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP,     CCMP, or GCMP encryption key is periodically renewed. (CVE-2020-24587)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated.
    Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an     adversary can abuse this to inject arbitrary network packets. (CVE-2020-24588)

  - A vulnerability was found in Linux Kernel where refcount leak in llcp_sock_bind() causing use-after-free     which might lead to privilege escalations. (CVE-2020-25670)

  - A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-     free which might lead to privilege escalations. (CVE-2020-25671)

  - A memory leak vulnerability was found in Linux kernel in llcp_sock_connect (CVE-2020-25672)

  - A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak     and eventually hanging-up the system. (CVE-2020-25673)

  - An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other     clients even though the sender has not yet successfully authenticated to the AP. This might be abused in     projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier     to exploit other vulnerabilities in connected clients. (CVE-2020-26139)

  - An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation     does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can     abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-     confidentiality protocol. (CVE-2020-26141)

  - An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3     implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process     them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets     independent of the network configuration. (CVE-2020-26145)

  - An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble     fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject     packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP,     CCMP, or GCMP data-confidentiality protocol is used. (CVE-2020-26147)

  - An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-     of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects     pointer types that do not define a ptr_limit. (CVE-2020-27170)

  - An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error     (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to     side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory,     aka CID-10d2bb2e6b1d. (CVE-2020-27171)

  - An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users     can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.
    (CVE-2020-27673)

  - A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the     ability to set extended attributes to panic the system, causing memory corruption or escalating     privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system     availability. (CVE-2020-27815)

  - An out-of-bounds (OOB) memory access flaw was found in x25_bind in net/x25/af_x25.c in the Linux kernel     version v5.12-rc5. A bounds check failure allows a local attacker with a user account on the system to     gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information.
    The highest threat from this vulnerability is to confidentiality, integrity, as well as system     availability. (CVE-2020-35519)

  - An issue was discovered in the Linux kernel before 5.8. arch/x86/kvm/svm/svm.c allows a     set_memory_region_test infinite loop for certain nested page faults, aka CID-e72436bc3a52.
    (CVE-2020-36310)

  - An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a     denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering     many encrypted regions), aka CID-7be74942f184. (CVE-2020-36311)

  - An issue was discovered in the Linux kernel before 5.8.10. virt/kvm/kvm_main.c has a     kvm_io_bus_unregister_dev memory leak upon a kmalloc failure, aka CID-f65886606c2d. (CVE-2020-36312)

  - An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka     CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system     crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as     CVE-2021-28950. (CVE-2020-36322)

  - An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in     the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local     user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability     is to confidentiality, integrity, as well as system availability. (CVE-2021-20268)

  - Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to     elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local     user with the CAP_NET_RAW capability. (CVE-2021-23134)

  - An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine     the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI     subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at     /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in     drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the     pointer to an iscsi_transport struct in the kernel module's global variables. (CVE-2021-27363)

  - An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is     adversely affected by the ability of an unprivileged user to craft Netlink messages. (CVE-2021-27364)

  - An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have     appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can     send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a     Netlink message. (CVE-2021-27365)

  - An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the     netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of     changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior     of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
    (CVE-2021-28038)

  - An issue was discovered in the Linux kernel through 5.11.6. fastrpc_internal_invoke in     drivers/misc/fastrpc.c does not prevent user applications from sending kernel RPC messages, aka     CID-20c40794eb85. This is a related issue to CVE-2019-2308. (CVE-2021-28375)

  - rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6     allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases,     CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may     have situations in which a drivers/staging issue is relevant to their own customer base. (CVE-2021-28660)

  - The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use     uninitialized or stale values. This initialization went too far and may under certain conditions also     overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking     persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died,     leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable.
    XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

  - An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A stall on CPU can occur     because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1. (CVE-2021-28950)

  - An issue was discovered in the Linux kernel through 5.11.8. The sound/soc/qcom/sdm845.c soundwire device     driver has a buffer overflow when an unexpected port ID number is encountered, aka CID-1c668e1c0a0f. (This     has been fixed in 5.12-rc4.) (CVE-2021-28952)

  - A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It     allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer     before a cloning operation, aka CID-dbcc7d57bffc. (CVE-2021-28964)

  - In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some     Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS     status in a PEBS record is mishandled, aka CID-d88d05a9e0b6. (CVE-2021-28971)

  - In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has     a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing     userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and     remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8. (CVE-2021-28972)

  - BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements,     allowing them to execute arbitrary code within the kernel context. This affects     arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. (CVE-2021-29154)

  - An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable     out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer     arithmetic operations, the pointer modification performed by the first operation is not correctly     accounted for when restricting subsequent operations. (CVE-2021-29155)

  - An issue was discovered in the Linux kernel through 5.11.10. drivers/net/ethernet/freescale/gianfar.c in     the Freescale Gianfar Ethernet driver allows attackers to cause a system crash because a negative fragment     size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is     enabled, aka CID-d8861bab48b6. (CVE-2021-29264)

  - An issue was discovered in the Linux kernel before 5.11.7. usbip_sockfd_store in     drivers/usb/usbip/stub_dev.c allows attackers to cause a denial of service (GPF) because the stub-up     sequence has race conditions during an update of the local and shared status, aka CID-9380afd6df70.
    (CVE-2021-29265)

  - An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows     attackers to obtain sensitive information from kernel memory because of a partially uninitialized data     structure, aka CID-50535249f624. (CVE-2021-29647)

  - An issue was discovered in the Linux kernel before 5.11.11. The netfilter subsystem allows attackers to     cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h     lack a full memory barrier upon the assignment of a new table value, aka CID-175e476b8cdf.
    (CVE-2021-29650)

  - An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in     drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.
    (CVE-2021-30002)

  - net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI     controller. (CVE-2021-32399)

  - In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an     hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. (CVE-2021-33034)

  - kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic     operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel     memory, leading to local privilege escalation to root. In particular, there is a corner case where the off     reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
    (CVE-2021-33200)

  - A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is     corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an     integer overflow, A local attacker with a special user privilege may cause a system crash problem which     can lead to an availability threat. (CVE-2021-3428)

  - The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when     the source register was known to be 0. A local attacker with the ability to load bpf programs could use     this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and     possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in     the upstream kernel in commit 9b00f1b78809 (bpf: Fix truncation handling for mod32 dst reg wrt zero) and     in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101. (CVE-2021-3444)

  - A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice     into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest     threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions     before kernel 5.12-rc6 are affected (CVE-2021-3483)

  - The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size     was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel     and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (bpf, ringbuf: Deny     reserve of buffers larger than ringbuf) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (bpf: Implement BPF ring buffer and verifier     support for it) (v5.8-rc1). (CVE-2021-3489)

  - The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly     update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and     therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (bpf: Fix alu32 const     subreg bound tracking on bitwise operations) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (bpf: Verifier, do     explicit ALU32 bounds tracking) (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (bpf:Fix a     verifier failure with xor) ( 5.10-rc1). (CVE-2021-3490)

  - The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the     PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem.
    This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was     addressed via commit d1f82808877b (io_uring: truncate lengths larger than MAX_RW_COUNT on provide     buffers) (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was     introduced in ddf0322db79c (io_uring: add IORING_OP_PROVIDE_BUFFERS) (v5.7-rc1). (CVE-2021-3491)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2577-1 advisory.

  - An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka     CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system     crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as     CVE-2021-28950. (CVE-2020-36322)

  - An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-     free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is     called, aka CID-f5449e74802c. (CVE-2020-36385)

  - A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c.
    This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name     space (CVE-2021-22555)

  - A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel     privilege escalation from the context of a network service or an unprivileged process. If     sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the     auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network     service privileges to escalate to root or from the context of an unprivileged user directly if a     BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket. (CVE-2021-23133)

  - An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine     the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI     subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at     /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in     drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the     pointer to an iscsi_transport struct in the kernel module's global variables. (CVE-2021-27363)

  - An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is     adversely affected by the ability of an unprivileged user to craft Netlink messages. (CVE-2021-27364)

  - An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have     appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can     send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a     Netlink message. (CVE-2021-27365)

  - rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6     allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases,     CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may     have situations in which a drivers/staging issue is relevant to their own customer base. (CVE-2021-28660)

  - The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use     uninitialized or stale values. This initialization went too far and may under certain conditions also     overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking     persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died,     leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable.
    XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

  - BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements,     allowing them to execute arbitrary code within the kernel context. This affects     arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. (CVE-2021-29154)

  - net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI     controller. (CVE-2021-32399)

  - In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an     hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. (CVE-2021-33034)

  - fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer     allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an     unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

  - The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when     the source register was known to be 0. A local attacker with the ability to load bpf programs could use     this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and     possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in     the upstream kernel in commit 9b00f1b78809 (bpf: Fix truncation handling for mod32 dst reg wrt zero) and     in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101. (CVE-2021-3444)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

SUSE Linux Enterprise 15 SP2カーネルRTが更新され、さまざまなセキュリティおよびバグの修正が行われています。

以下のセキュリティバグが修正されました。

CVE-2021-3444: ソースレジスタが 0 であることが判明している場合に mod32 デスティネーションレジスタの切り捨てを適切に処理しない bpf 検証機能の問題を修正しました。これは領域外読み取りを引き起こします (bsc#1184170)。

CVE-2021-3428: ext4_es_cache_extent の整数オーバーフローを修正しました (bsc#1173485)。

CVE-2021-29647: 部分的に初期化されていないデータ構造が原因で、攻撃者がカーネルメモリから機密情報を取得する可能性がある qrtr_recvmsg の問題を修正しました (bsc#1184192)。

CVE-2021-29265: usbip_sockfd_store の問題を修正しました。この問題により、ローカルおよび共有ステータスの更新中の競合状態により、攻撃者がサービス拒否を引き起こす可能性がありました (bsc#1184167)。

CVE-2021-29264: 負のフラグメントサイズの計算により、攻撃者がシステムクラッシュを引き起こす可能性があった、Freescale Gianfar Ethernet ドライバーの問題を修正しました (bsc#1184168)。

CVE-2021-28972: - ユーザー空間からドライバーに新しいデバイス名を書き込む場合に、ユーザー空間がカーネルスタックフレームに直接データを書き込む可能性があるユーザーが許容可能なバッファオーバーフローを修正しました (bsc#1184198)。

CVE-2021-28971: PEBS レコードの PEBS ステータスが不適切に処理されたためにシステムクラッシュを引き起こす可能性があった intel_pmu_drain_pebs_nhm の問題を修正しました (bsc#1184196)。

CVE-2021-28964: 攻撃者がサービス拒否を引き起こす可能性のある get_old_root の競合状態を修正しました (bsc#1184193)。

CVE-2021-28688: XSA-365 によって導入された問題を修正しました (bsc#1183646)。

CVE-2021-28660: rtw_wx_set_scan での領域外書き込みを修正しました (bsc#1183593)。

CVE-2021-28375: ユーザーアプリケーションがカーネル RPC メッセージを送信することを妨げなかった fastrpc_internal_invoke の問題を修正しました (bsc#1183596)。

CVE-2021-28038: 失敗したメモリ割り当てなどの必要なエラーの処理が欠如していた netback ドライバーの問題を修正しました (bsc#1183022)。

CVE-2021-27365: 権限のないユーザーが、iSCSI に関連付けられ、Netlink メッセージの最大長までの長さがある Netlink メッセージを送信することが可能です (bsc#1182715)。

CVE-2021-27364: 攻撃者が Netlink メッセージを細工する可能性がある問題を修正しました (bsc#1182717)。

CVE-2021-27363: iscsi_transport 構造体のアドレスの判別に使用される可能性があるカーネルポインターの漏洩を修正しました (bsc#1182716)。

CVE-2020-35519: x25_bind で見つかった領域外メモリアクセスを修正しました (bsc#1183696)。

CVE-2020-27815: 攻撃者がコードを実行する可能性がある、JFS ファイルシステムの問題を修正しました (bsc#1179454)。

CVE-2020-27171: Spectre の緩和策が無効にされ、カーネルメモリから機密情報が取得するサイドチャネル攻撃を引き起こす、ポインター計算の領域外の投機に影響を与える off-by-one エラーを修正しました (bsc#1183775)。

CVE-2020-27170: Spectre の緩和を無効にし、カーネルメモリから機密情報を取得する潜在的なサイドチャネル攻撃を修正しました (bsc#1183686)。

CVE-2019-19769: perf_trace_lock_acquire 関数のメモリ解放後使用 (Use After Free) を修正しました (bsc#1159280)。

CVE-2019-18814: aa_audit_rule_init() で aa_label_parse() が失敗する場合のメモリ解放後使用 (Use After Free) を修正しました (bsc#1156256)。

CVE-2020-25670、CVE-2020-25671、CVE-2020-25672、CVE-2020-25673: NFC サブシステムの複数のバグを修正しました (bsc#1178181)。

CVE-2020-36311: 大きな SEV VM の破壊を発生させることによるサービス拒否 (ソフトロックアップ) を修正しました (bsc#1184511)。

CVE-2021-29154: 任意のコードの実行が可能になる分岐変位の不適切な計算を修正しました。(bsc#1184391)

CVE-2021-30002: video_usercopy の大きな引数のメモリリークを修正しました (bsc#1184120)。

CVE-2021-3483: nosy.c におけるメモリ解放後使用 (Use After Free) の問題を修正しました (bsc#1184393)。

CVE-2020-36310: 特定のネストされたページフォールトの無限ループを修正しました (bsc#1184512)。

CVE-2020-36312: kmalloc エラー時のメモリリークを修正しました (bsc#1184509)。

CVE-2021-28950: 再試行ループが同じ不良の inode を継続的に見つけていたために発生する、fs/fuse/fuse_i.h の問題を修正しました (bsc#1184194)。

更新パッケージには、セキュリティ関連以外の修正も含まれています。詳細については、アドバイザリを参照してください。

注意:Tenable Network Securityは、前述の記述ブロックをSUSEセキュリティアドバイザリから直接抽出しています。Tenable では、そこに新しい問題を追加することはせずに、できる限り自動的に整理と書式設定をするようにしています。

SUSE Linux Enterprise 15カーネルが更新され、さまざまなセキュリティおよびバグの修正が行われています。

以下のセキュリティバグが修正されました。

CVE-2020-36312: kmalloc 失敗時に kvm_io_bus_unregister_dev メモリリークを生じさせる virt/kvm/kvm_main.c の問題を修正しました (bnc#1184509)。

CVE-2021-29650: netfilter サブシステムでは、net/netfilter/x_tables.c と include/linux/netfilter/x_tables.h が新しいテーブル値の割り当て時に完全なメモリバリアを欠いているため、攻撃者がサービス拒否 (パニック) を引き起こす可能性があります (bnc#1184208)。

CVE-2021-29155: ポインター計算に対して望ましくない領域外の投機を実行し、サイドチャネル攻撃が引き起こすこの攻撃では Spectre の緩和策が無効にされ、カーネルメモリから機密情報が取得される kernel/bpf/verifier.c 内の問題を修正しました。具体的には、一連のポインター演算操作で、最初の操作で実行されたポインターの変更が、後続の操作を制限するときに正しく考慮されません (bnc#1184942)。

CVE-2020-36310: 特定のネストされたページフォールトに対して set_memory_region_test の無限ループを可能にする arch/x86/kvm/svm/svm.c の問題を修正しました (bnc#1184512)。

CVE-2020-27673: ゲスト OS ユーザーが dom0 への高レートのイベントを介してサービス拒否 (ホスト OS のハングアップ) を引き起こす可能性がある Xen の問題を修正しました (bnc#1177411、bnc#1184583)。

CVE-2021-29154: カーネルコンテキスト内で任意のコードを実行できる BPF JIT コンパイラを修正しました (bnc#1184391)。

CVE-2020-25673: llcp_sock_connect() の繰り返しによって引き起こされる NFC 無限ループを修正しました (bsc#1178181)。

CVE-2020-25672: llcp_sock_connect() の NFC メモリリークを修正しました (bsc#1178181)。

CVE-2020-25671: llcp_sock_connect() の NFC メモリリークを修正しました (bsc#1178181)。

CVE-2020-25670: llcp_sock_bind() の NFC メモリリークを修正しました (bsc#1178181)。

CVE-2020-36311: arch/x86/kvm/svm/sev.c により、攻撃者は大規模な SEV VM (多くの暗号化された領域の登録解除を必要とする) の破壊をトリガーすることにより、サービス拒否 (ソフトロックアップ) を引き起こすことが可能です (bnc#1184511)。

CVE-2021-28950: 再試行ループが同じ不良 inode を継続的に検出するために「CPU のストール」が発生する可能性がある、fs/fuse/fuse_i.h の問題を修正しました (bnc#1184194、bnc#1184211)。

CVE-2020-36322: 不適切な状況で fuse_do_getattr() が make_bad_inode() を呼び出し、システムクラッシュを引き起こす FUSE ファイルシステムの実装内の問題を修正しました。注: この脆弱性に対する元の修正は不完全であり、その不完全性は CVE-2021-28950として追跡されています (bnc#1184211)。

CVE-2021-30002: Web カメラデバイスが存在する場合のメモリリークの問題を修正しました (bnc#1184120)。

CVE-2021-3483: nosy_ioctl() におけるメモリ解放後使用 (Use After Free) のバグを修正しました (bsc#1184393)。

CVE-2021-20219: Linux カーネルの drivers/tty/n_tty.c でサービス拒否の脆弱性を修正しました。この欠陥では、通常のユーザー権限を持つローカルの攻撃者がループを遅延させ、システムの可用性に脅威を与える可能性があります (bnc#1184397)。

CVE-2021-28964: クローン操作の前にエクステントバッファのロックがないためにサービス拒否を引き起こす可能性があった fs/btrfs/ctree.c の競合状態を修正しました (bnc#1184193)。

CVE-2021-3444: ソースレジスタが 0 であることが判明している場合に mod32 デスティネーションレジスタの切り捨てを適切に処理しない bpf 検証機能の問題を修正しました。bpf プログラムをロードできるローカルの攻撃者が、これを利用して、カーネルメモリの領域外読み取りを行う可能性があります。これにより、コード実行につながる可能性のある領域外書き込みが引き起こされる可能性があります (bnc#1184170)。

CVE-2021-28971: intel_pmu_drain_pebs_nhm で、PEBS レコードの PEBS ステータスが不適切に処理されるためにユーザー空間アプリケーションがシステムクラッシュを引き起こす可能性がある、ローカルのサービス拒否の可能性を修正しました (bnc#1184196)。

CVE-2021-28688: 後続のクリーンアップコードが初期化されていない、または古い値を使用しないように、ポインターの初期化を含める XSA-365 を修正しました。この初期化が過剰に行われ、特定の条件下で、クリーンアップが必要なポインターも上書きする可能性があります。
クリーンアップの欠如により、永続的な付与が漏洩する可能性があります。この漏洩は、それぞれのゲストが死んだ後の完全なクリーンアップ防ぎ、ゾンビドメインを残します (bnc#1183646)。

CVE-2021-29265: - ローカルと共有のステータスの更新中にスタブアップシーケンスの競合状態があるため、攻撃者がサービス拒否 (GPF) を引き起こす可能性がある drivers/usb/usbip/stub_dev.c の usbip_sockfd_store の問題を修正しました (bnc#1184167)。

CVE-2021-29264: 攻撃者がシステムクラッシュを引き起こす可能性のある Freescale Gianfar Ethernet ドライバーの drivers/net/ethernet/freescale/gianfar.c の問題を修正しました。この問題は、ジャンボパケットが使用され、NAPI が有効になっているとき、rx キューオーバーランが発生し NID が有効な場合にマイナスのフラグメントサイズが計算されるために発生します (bnc#1184168)。

CVE-2021-28972: ユーザー空間からドライバーに新しいデバイス名を書き込む場合に、RPA PCI ホットプラグドライバーに、ユーザーが許容可能なバッファオーバーフローが存在する drivers/pci/hotplug/rpadlpar_sysfs.c の問題を修正しました。この問題により、ユーザー空間がカーネルスタックフレームに直接データを書き込む可能性があります。これは、add_slot_store と remove_slot_store が drc_name の「\0」終了を誤って処理するために発生します。(bnc#1184198)

CVE-2021-29647: 部分的に初期化されていないデータ構造が原因で、攻撃者がカーネルメモリから機密情報を取得する可能性がある net/qrtr/qrtr.c のカーネル qrtr_recvmsg の問題を修正しました (bnc#1184192)。

CVE-2020-27171: ポインター計算に対する領域外の投機に影響する off-by-one エラー (その結果整数アンダーフローが発生) を持つ kernel/bpf/verifier.c の問題を修正しました。この問題により、Spectre の緩和策が無効にされ、カーネルメモリから機密情報が取得されるサイドチャネル攻撃が引き起こされます (bnc#1183686、bnc#1183775)。

CVE-2020-27170: ポインター計算に対して望ましくない領域外の投機を実行し、Spectre の緩和策が無効にしたり、カーネルメモリから機密情報が取得されたりするサイドチャネル攻撃を引き起こす kernel/bpf/verifier.c の問題を修正しました。これは、ptr_limit を定義しないポインタータイプに影響します。(bnc#1183686 bnc#1183775)

CVE-2021-28660: ssid 配列の終端を超えて書き込む可能性のある drivers/staging/rtl8188eu/os_dep/ioctl_linux.c 内の rtw_wx_set_scan の問題を修正しました (bnc#1183593)。

CVE-2020-35519: x25 修正のパッチリファレンスを更新します (bsc#1183696)。

CVE-2021-3428: ext4_es_cache_extent の ext4 整数オーバーフローを修正しました (bsc#1173485、bsc#1183509)。

CVE-2020-0433: 不適切なロックによるメモリ解放後使用 (Use After Free) が発生する可能性のある blk-mq-tag.c の blk_mq_queue_tag_busy_iter を修正しました。
これにより、追加の実行権限が不要になり、ローカルで権限が昇格される可能性があります。悪用するのにユーザーの操作は必要ありません(bnc#1176720)。

CVE-2021-28038: Xen PV の問題を修正しました。netbackドライバーの特定の部分で、失敗したメモリ割り当てなどのエラー(割り当てマッピングエラーの処理に対する変更結果として)の必要な処理が欠けています。ホストOSのサービス拒否が、ネットワークフロントエンドドライバーが誤動作している中に発生する可能性があります。注: この問題は CVE-2021-26931 の修正が不完全なために存在します (bnc#1183022、bnc#1183069)。

CVE-2020-27815: dbAdjTree の jfs 配列インデックス境界チェックを修正します (bsc#1179454)。

CVE-2021-27365: 適切な長さの制約またはチェックがなく、PAGE_SIZE 値を超える可能性がある iSCSI データ構造内の問題を修正しました。権限のないユーザーが、iSCSI に関連付けられ、Netlink メッセージの最大長までの長さがある Netlink メッセージを送信することが可能です (bnc#1182715)。

CVE-2021-27363: iscsi_transport 構造体のアドレスの判別に使用される可能性があるカーネルポインター漏洩の問題を修正しました。iSCSIトランスポートがiSCSIサブシステムに登録されている場合、/sys/class/iscsi_transport/$TRANSPORT_NAME/handleで、権限のないユーザーがsysfsファイルシステムを介してトランスポートの処理を利用できます。読み取りの場合は、show_transport_handle関数(drivers / scsi / scsi_transport_iscsi.c内の)が呼び出され、処理が漏洩します。この処理は、実際にはカーネルモジュールのグローバル変数内の　iscsi_transport 構造体へのポインターとなっています (bnc#1182716)。

CVE-2021-27364: 権限のないユーザーが Netlink メッセージを細工できる可能性がある drivers/scsi/scsi_transport_iscsi.c の問題を修正しました (bnc#1182717)。

更新パッケージには、セキュリティ関連以外の修正も含まれています。詳細については、アドバイザリを参照してください。

注意:Tenable Network Securityは、前述の記述ブロックをSUSEセキュリティアドバイザリから直接抽出しています。Tenable では、そこに新しい問題を追加することはせずに、できる限り自動的に整理と書式設定をするようにしています。

リモートの SUSE Linux SLES15ホストには、SUSE-SU-2021:2577-1 のアドバイザリに記載されている複数の脆弱性の影響を受けるパッケージがインストールされています。

  -5.10.6より前のLinuxカーネルにおけるFUSEファイルシステムの実装で問題が発見されました (別名CID-5d069dbe8aaf.) 。fuse_do_getattr()が、不適切な状況で、make_bad_inode() を呼び出し、システムクラッシュを引き起こします。注: この脆弱性に対する元の修正は不完全であり、その不完全性は CVE-2021-28950として追跡されています。(CVE-2020-36322)

  - 5.10より以前の Linux カーネルに問題が発見されました。ucma_close が呼び出される ucma_migrate_id の状況で ctx_list 経由で ctx が到達されるため、drivers/infiniband/core/ucma.c にメモリ解放後使用 (Use After Free) があります (別名CID-f5449e74802c)。(CVE-2020-36385)

  - v2.6.19-rc1以降のLinuxがnet/netfilter/x_tables.cで発見されるヒープ領域外書き込み。
    これにより、攻撃者が特権を得るか、ユーザー名の空間を介してのDoS (ヒープメモリの破損経由) を引き起こすことができます (CVE-2021-22555)

  -5.12-rc8より前のLinuxカーネルSCTPソケット (net/sctp/socket.c) の競合状態により、ネットワークサービスのコンテキストまたは権限のないプロセスからのカーネル権限昇格につながる可能性があります。sock_net(sk)->sctp.addr_wq_lockなしでsctp_destroy_sockが呼び出された場合、適切なロックがない状態で、要素がauto_asconf_splistリストから削除されます。これが悪用され、ネットワークサービス権限を持つ攻撃者がrootへの権限昇格が行われる、あるいは一部のSCTPソケットの作成を拒否するBPF_CGROUP_INET_SOCK_CREATEが添付されている場合、権限のないユーザーのコンテキストから権限昇格が行われる可能性があります。 (CVE-2021-23133)

  - 5.11.3 までの Linux カーネルで問題が発見されました。カーネルポインターリークの漏洩により、iscsi_transport構造体のアドレスが判別されてしまいます。iSCSIトランスポートがiSCSIサブシステムに登録されている場合、/sys/class/iscsi_transport/$TRANSPORT_NAME/handleで、権限のないユーザーがsysfsファイルシステムを介してトランスポートの処理を利用できます。読み取りの場合は、show_transport_handle関数（drivers / scsi / scsi_transport_iscsi.c内の）が呼び出され、処理が漏洩します。この処理は、実際にはカーネルモジュールのグローバル変数内のiscsi_transport構造体へのポインターとなっています。（CVE-2021-27363）

  -5.11.3までのLinuxカーネルで問題が発見されました。drivers/scsi/scsi_transport_iscsi.cは、権限のないユーザーがNetlinkメッセージを作成する機能によって悪影響を受けます。（CVE-2021-27364）

  - 5.11.3までのLinuxカーネルで問題が発見されました。特定のiSCSIデータ構造には、適切な長さの制約またはチェックがなく、PAGE_SIZE値を超える可能性があります。権限のないユーザーが、iSCSIに関連付けられ、Netlinkメッセージの最大長までの長さがあるNetlinkメッセージを送信することが可能です。(CVE-2021-27365)

  - 5.11.6までのLinuxカーネルにおいて、drivers/staging/rtl8188eu/os_dep/ioctl_linux.c内のrtw_wx_set_scanにより、->ssid[]配列の終端を超えて書き込む可能性ができます。注：kernel.orgリリースの見地からすると、CVE IDは、drivers/staging/*（未完成の作業）に対して通常は使用されません。ただし、システムインテグレーターには、ドライバー/ステージングの問題が自分の顧客ベースに関連する状況がある場合があります。（CVE-2021-28660）

  - XSA-365の修正には、後続のクリーンアップコードが初期化されていない、または古い値を使用しないように、ポインターの初期化が含まれます。この初期化が過剰に行われ、特定の条件下で、クリーンアップが必要なポインターも上書きする可能性があります。クリーンアップの欠如により、永続的な付与が漏洩する可能性があります。この漏洩は、それぞれのゲストが死んだ後の完全なクリーンアップ防ぎ、ゾンビドメインを残します。XSA-365の修正プログラムが適用されたLinuxバージョンはすべて脆弱です。
    XSA-365 は、少なくとも 3.11 のバージョンに影響を与えると分類されました。(CVE-2021-28688)

  -5.11.12までのLinuxカーネルでのBPF JITコンパイラには、カーネルコンテキスト内で任意のコードを実行することができ、分岐変位の不正確な計算があります。これは、arch/x86/net/bpf_jit_comp.cおよびarch/x86/net/bpf_jit_comp32.cに影響を与えます。 (CVE-2021-29154)

  - 5.12.2までのLinuxカーネルのnet/bluetooth/hci_request.cには競合状態があり、HCIコントローラが除去されます。(CVE-2021-32399)

  - 5.12.4より前のLinuxカーネルのnet/bluetooth/hci_event.cには、hci_chan (別名CID-5c4c8c954409) を破壊する際のメモリ解放後使用 (Use-After-Free) があります。これは、任意の値の書き込みにつながります。(CVE-2021-33034)

  - 3.16 から 5.13.4 より前の 5.13.x までの Linux カーネルの fs/seq_file.c は、seq バッファ割り当てを適切に制限しないため、整数オーバーフロー、領域外書き込み、権限のないユーザーの root への昇格が引き起こされます (別名 CID-8cae8cd89f05)。(CVE-2021-33909)

  -ソースレジスタが0であることが判明している場合、Linuxカーネルのbpf検証機能が、mod32の宛先レジスタの切り捨てを適切に処理しませんでした。bpfプログラムをロードできるローカルの攻撃者が、これを利用して、カーネルメモリの領域外読み取りを行う可能性があります。これにより、コード実行につながる可能性のある領域外書き込みが引き起こされる可能性があります。この問題は、コミット9b00f1b78809(bpf: Fix truncation handling for mod32 dst reg wrt zero) の Upstream カーネルおよびLinux 安定版 (stable)カーネル 5.11.2、5.10.19、および 5.4.101 で修正されました。(CVE-2021-3444)

Nessus はこれらの問題をテストしておらず、代わりにアプリケーションの自己報告されたバージョン番号にのみ依存しています。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
151562	EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-2183)	Nessus	Huawei Local Security Checks	2021/7/13	2023/12/8	high
150901	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1977-1)	Nessus	SuSE Local Security Checks	2021/6/21	2023/7/13	critical
150927	SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1975-1)	Nessus	SuSE Local Security Checks	2021/6/21	2023/7/13	critical
152167	SUSE SLES15 Security Update : kernel (Live Patch 15 for SLE 15 SP2) (SUSE-SU-2021:2577-1)	Nessus	SuSE Local Security Checks	2021/7/31	2025/10/6	high
148438	openSUSEセキュリティ更新プログラム: Linux カーネル(openSUSE-2021-532)	Nessus	SuSE Local Security Checks	2021/4/12	2024/1/4	critical
148698	SUSE SLES15セキュリティ更新プログラム: カーネル(SUSE-SU-2021:1211-1)	Nessus	SuSE Local Security Checks	2021/4/16	2024/1/4	critical
149892	openSUSEセキュリティ更新プログラム: Linux カーネル(openSUSE-2021-758)	Nessus	SuSE Local Security Checks	2021/5/25	2023/12/28	critical
149462	SUSE SLES15セキュリティ更新プログラム: カーネル(SUSE-SU-2021:1573-1)	Nessus	SuSE Local Security Checks	2021/5/13	2024/1/2	high
150901	SUSE SLED15/ SLES15セキュリティ更新プログラム: カーネル (SUSE-SU-2021:1977-1)	Nessus	SuSE Local Security Checks	2021/6/21	2023/7/13	critical
150927	SUSE SLES15 セキュリティ更新プログラム: カーネル (SUSE-SU-2021:1975-1)	Nessus	SuSE Local Security Checks	2021/6/21	2023/7/13	critical
152167	SUSE SLES15セキュリティ更新プログラム: kernel (SLE 15 SP2 用の Live Patch 15) (SUSE-SU-2021:2577-1)	Nessus	SuSE Local Security Checks	2021/7/31	2025/10/6	high

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