The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-9364 advisory.

    - Document CVE-2021-4145 as fixed (Mark Kanda) [Orabug: 33791496] {CVE-2021-4145}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2022:1759 advisory.

    * QEMU: virtio-net: heap use-after-free in virtio_net_receive_rcu (CVE-2021-3748)

    * ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due to incorrect check of     bytes_in_use value in MFT records (CVE-2021-33285)

    * ntfs-3g: Heap buffer overflow triggered by a specially crafted Unicode string (CVE-2021-33286)

    * ntfs-3g: Heap buffer overflow in ntfs_attr_pread_i() triggered by specially crafted NTFS attributes     (CVE-2021-33287)

    * ntfs-3g: Heap buffer overflow triggered by a specially crafted MFT section (CVE-2021-33289)

    * ntfs-3g: Heap buffer overflow triggered by a specially crafted NTFS inode pathname (CVE-2021-35266)

    * ntfs-3g: Stack buffer overflow triggered when correcting differences between MFT and MFTMirror sections     (CVE-2021-35267)

    * ntfs-3g: Heap buffer overflow in ntfs_inode_real_open() triggered by a specially crafted NTFS inode     (CVE-2021-35268)

    * ntfs-3g: Heap buffer overflow in ntfs_attr_setup_flag() triggered by a specially crafted NTFS attribute     from MFT (CVE-2021-35269)

    * ntfs-3g: NULL pointer dereference in ntfs_extent_inode_open() (CVE-2021-39251)

    * ntfs-3g: Out-of-bounds read in ntfs_ie_lookup() (CVE-2021-39252)

    * ntfs-3g: Out-of-bounds read in ntfs_runlists_merge_i() (CVE-2021-39253)

    * ntfs-3g: Integer overflow in memmove() leading to heap buffer overflow in ntfs_attr_record_resize()     (CVE-2021-39254)

    * ntfs-3g: Out-of-bounds read ntfs_attr_find_in_attrdef() triggered by an invalid attribute     (CVE-2021-39255)

    * ntfs-3g: Heap buffer overflow in ntfs_inode_lookup_by_name() (CVE-2021-39256)

    * ntfs-3g: Endless recursion from ntfs_attr_pwrite() triggered by an unallocated bitmap (CVE-2021-39257)

    * ntfs-3g: Out-of-bounds reads in ntfs_attr_find() and ntfs_external_attr_find() (CVE-2021-39258)

    * ntfs-3g: Out-of-bounds access in ntfs_inode_lookup_by_name() caused by an unsanitized attribute length     (CVE-2021-39259)

    * ntfs-3g: Out-of-bounds access in ntfs_inode_sync_standard_information() (CVE-2021-39260)

    * ntfs-3g: Heap buffer overflow in ntfs_compressed_pwrite() (CVE-2021-39261)

    * ntfs-3g: Out-of-bounds access in ntfs_decompress() (CVE-2021-39262)

    * ntfs-3g: Heap buffer overflow in ntfs_get_attribute_value() caused by an unsanitized attribute     (CVE-2021-39263)

    * libnbd: nbdcopy: missing error handling may create corrupted destination image (CVE-2022-0485)

    * hivex: stack overflow due to recursive call of _get_children() (CVE-2021-3622)

    * nbdkit: NBD_OPT_STRUCTURED_REPLY injection on STARTTLS (CVE-2021-3716)

    * libvirt: segmentation fault during VM shutdown can lead to vdsm hang (CVE-2021-3975)

    * QEMU: NULL pointer dereference in mirror_wait_on_conflicts() in block/mirror.c (CVE-2021-4145)

    * QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c (CVE-2021-4158)

    * QEMU: block: fdc: null pointer dereference may lead to guest crash (CVE-2021-20196)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0168 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2021-4206:
    A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc()     function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer     overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or     potentially execute arbitrary code within the context of the QEMU process.

    CVE-2021-4207:
    A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values     `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object     followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw     to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU     process.

    CVE-2022-26353:
    A flaw was found in the virtio-net device of QEMU. This flaw was inadvertently introduced with the fix for     CVE-2021-3748, which forgot to unmap the cached virtqueue elements on error, leading to memory leakage and     other unexpected results. Affected QEMU version: 6.2.0.

    CVE-2021-20196:
    A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while     processing read/write ioport commands if the selected floppy drive is not initialized with a block device.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of     service. The highest threat from this vulnerability is to system availability.

    CVE-2021-33285:
    In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function     ntfs_get_attribute_value, a heap buffer overflow can occur allowing for memory disclosure or denial of     service. The vulnerability is caused by an out-of-bound buffer access which can be triggered by mounting a     crafted ntfs partition. The root cause is a missing consistency check after reading an MFT record : the     bytes_in_use field should be less than the bytes_allocated field. When it is not, the parsing of the     records proceeds into the wild.

    CVE-2021-33286:
    In NTFS-3G versions < 2021.8.22, when a specially crafted unicode string is supplied in an NTFS image a     heap buffer overflow can occur and allow for code execution.

    CVE-2021-33287:
    In NTFS-3G versions < 2021.8.22, when specially crafted NTFS attributes are read in the function     ntfs_attr_pread_i, a heap buffer overflow can occur and allow for writing to arbitrary memory or denial of     service of the application.

    CVE-2021-33289:
    In NTFS-3G versions < 2021.8.22, when a specially crafted MFT section is supplied in an NTFS image a heap     buffer overflow can occur and allow for code execution.

    CVE-2021-35266:
    In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS inode pathname is supplied in an NTFS image     a heap buffer overflow can occur resulting in memory disclosure, denial of service and even code     execution.

    CVE-2021-35267:
    NTFS-3G versions < 2021.8.22, a stack buffer overflow can occur when correcting differences in the MFT and     MFTMirror allowing for code execution or escalation of privileges when setuid-root.

    CVE-2021-35268:
    In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS inode is loaded in the function     ntfs_inode_real_open, a heap buffer overflow can occur allowing for code execution and escalation of     privileges.

    CVE-2021-35269:
    NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute from the MFT is setup in the     function ntfs_attr_setup_flag, a heap buffer overflow can occur allowing for code execution and escalation     of privileges.

    CVE-2021-3622:
    A flaw was found in the hivex library. This flaw allows an attacker to input a specially crafted Windows     Registry (hive) file, which would cause hivex to recursively call the _get_children() function, leading to     a stack overflow. The highest threat from this vulnerability is to system availability.

    CVE-2021-3716:
    A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption     boundary. A MitM attacker could use this flaw to inject a plaintext NBD_OPT_STRUCTURED_REPLY before     proxying everything else a client sends to the server, potentially leading the client to terminate the NBD     session. The highest threat from this vulnerability is to system availability.

    CVE-2021-3748:
    A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the     descriptor's address belongs to the non direct access region, due to num_buffers being set after the     virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a     denial of service condition, or potentially execute code on the host with the privileges of the QEMU     process.

    CVE-2021-39251:
    A crafted NTFS image can cause a NULL pointer dereference in ntfs_extent_inode_open in NTFS-3G <     2021.8.22.

    CVE-2021-39252:
    A crafted NTFS image can cause an out-of-bounds read in ntfs_ie_lookup in NTFS-3G < 2021.8.22.

    CVE-2021-39253:
    A crafted NTFS image can cause an out-of-bounds read in ntfs_runlists_merge_i in NTFS-3G < 2021.8.22.

    CVE-2021-39254:
    A crafted NTFS image can cause an integer overflow in memmove, leading to a heap-based buffer overflow in     the function ntfs_attr_record_resize, in NTFS-3G < 2021.8.22.

    CVE-2021-39255:
    A crafted NTFS image can trigger an out-of-bounds read, caused by an invalid attribute in     ntfs_attr_find_in_attrdef, in NTFS-3G < 2021.8.22.

    CVE-2021-39256:
    A crafted NTFS image can cause a heap-based buffer overflow in ntfs_inode_lookup_by_name in NTFS-3G <     2021.8.22.

    CVE-2021-39257:
    A crafted NTFS image with an unallocated bitmap can lead to a endless recursive function call chain     (starting from ntfs_attr_pwrite), causing stack consumption in NTFS-3G < 2021.8.22.

    CVE-2021-39258:
    A crafted NTFS image can cause out-of-bounds reads in ntfs_attr_find and ntfs_external_attr_find in     NTFS-3G < 2021.8.22.

    CVE-2021-39259:
    A crafted NTFS image can trigger an out-of-bounds access, caused by an unsanitized attribute length in     ntfs_inode_lookup_by_name, in NTFS-3G < 2021.8.22.

    CVE-2021-39260:
    A crafted NTFS image can cause an out-of-bounds access in ntfs_inode_sync_standard_information in NTFS-3G     < 2021.8.22.

    CVE-2021-39261:
    A crafted NTFS image can cause a heap-based buffer overflow in ntfs_compressed_pwrite in NTFS-3G <     2021.8.22.

    CVE-2021-39262:
    A crafted NTFS image can cause an out-of-bounds access in ntfs_decompress in NTFS-3G < 2021.8.22.

    CVE-2021-39263:
    A crafted NTFS image can trigger a heap-based buffer overflow, caused by an unsanitized attribute in     ntfs_get_attribute_value, in NTFS-3G < 2021.8.22.

    CVE-2021-3975:
    A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in     qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a     monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is     shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial     of service attack by causing the libvirt daemon to crash.

    CVE-2021-4145:
    A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0.
    The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A     malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host     when writing data reaches the threshold of mirroring node.

    CVE-2021-4158:
    A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within     the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service     condition.

    CVE-2022-0485:
    A flaw was found in the copying tool `nbdcopy` of libnbd. When performing multi-threaded copies using     asynchronous nbd calls, nbdcopy was blindly treating the completion of an asynchronous command as     successful, rather than checking the *error parameter. This could result in the silent creation of a     corrupted destination image.

    CVE-2022-26354:
    A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached     from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results.
    Affected QEMU versions <= 6.2.0.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

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

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

  - In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the     ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A     malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.
    (CVE-2019-20808)

  - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing     transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid     values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The     highest threat from this vulnerability is to system availability. (CVE-2021-20257)

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. The issue occurs while     handling a 'PVRDMA_CMD_CREATE_MR' command due to improper memory remapping (mremap). This flaw allows a     malicious guest to crash the QEMU process on the host. The highest threat from this vulnerability is to     system availability. (CVE-2021-3582)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the bootp_input() function and could occur while processing a udp packet that is smaller than     the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of     uninitialized heap memory from the host. The highest threat from this vulnerability is to data     confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3593)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3594)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3595)

  - An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions     prior to 6.1.0. The issue occurs while handling a 'PVRDMA_REG_DSRHIGH' write from the guest due to     improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount     of memory, resulting in a denial of service. The highest threat from this vulnerability is to system     availability. (CVE-2021-3607)

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to     6.1.0. The issue occurs while handling a 'PVRDMA_REG_DSRHIGH' write from the guest and may result in a     crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest     threat from this vulnerability is to system availability. (CVE-2021-3608)

  - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the     descriptor's address belongs to the non direct access region, due to num_buffers being set after the     virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a     denial of service condition, or potentially execute code on the host with the privileges of the QEMU     process. (CVE-2021-3748)

  - An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE     SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious     guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
    (CVE-2021-3930)

  - A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0.
    The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A     malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host     when writing data reaches the threshold of mirroring node. (CVE-2021-4145)

  - A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached     from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results.
    Affected QEMU versions <= 6.2.0. (CVE-2022-26354)

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 version of AHV installed on the remote host is prior to 20230302.102005. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-20230302.101026 advisory.

  - A crafted NTFS image can trigger a heap-based buffer overflow, caused by an unsanitized attribute in     ntfs_get_attribute_value, in NTFS-3G < 2021.8.22. (CVE-2021-39263)

  - EDK2's Network Package is susceptible to a buffer overflow vulnerability when processing DNS Servers     option from a DHCPv6 Advertise message. This vulnerability can be exploited by an attacker to gain     unauthorized access and potentially lead to a loss of Confidentiality, Integrity and/or Availability.
    (CVE-2023-45234)

  - Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote     attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the     KeyTrap issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the     protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG     records. (CVE-2023-50387)

  - The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped)     allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC     responses in a random subdomain attack, aka the NSEC3 issue. The RFC 5155 specification implies that an     algorithm must perform thousands of iterations of a hash function in certain situations. (CVE-2023-50868)

  - close_altfile in filename.c in less before 606 omits shell_quote calls for LESSCLOSE. (CVE-2022-48624)

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
160859	Oracle Linux 8 : virt:kvm_utils (ELSA-2022-9364)	Nessus	Oracle Linux Local Security Checks	2022/5/10	2024/11/1	medium
161144	AlmaLinux 8 : virt:rhel and virt-devel:rhel (ALSA-2022:1759)	Nessus	Alma Linux Local Security Checks	2022/5/12	2025/1/13	high
236413	Alibaba Cloud Linux 3 : 0168: virt:rhel and virt-devel:rhel (ALINUX3-SA-2022:0168)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	high
163161	EulerOS Virtualization 2.10.0 : qemu (EulerOS-SA-2022-2043)	Nessus	Huawei Local Security Checks	2022/7/14	2023/10/18	high
163175	EulerOS Virtualization 2.10.1 : qemu (EulerOS-SA-2022-2071)	Nessus	Huawei Local Security Checks	2022/7/14	2023/10/18	high
206824	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-20230302.101026)	Nessus	Misc.	2024/9/9	2025/10/6	medium

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