This update for libvirt fixes the following issues :

&#9; - CVE-2020-15708: Added a note to libvirtd.conf about polkit auth in SUSE distros (bsc#1174955).

  - CVE-2020-25637: Fixed a double free in     qemuAgentGetInterfaces() (bsc#1177155).

  - qemu: Adjust max memlock on mdev hotplug (bsc#1177480).

  - Xen: Don't add dom0 twice on driver reload     (bsc#1176430).

  - virdevmapper: Handle kernel without device-mapper     support (bsc#1175465).

  - Fixed an issue where building was failing (bsc#1175574).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

This update for libvirt fixes the following issues :

CVE-2020-15708: Added a note to libvirtd.conf about polkit auth in SUSE distros (bsc#1174955).

CVE-2020-25637: Fixed a double free in qemuAgentGetInterfaces() (bsc#1177155).

qemu: Avoid stale capabilities cache host CPU or kernel command line changes (bsc#1173157).

virdevmapper: Handle kernel without device-mapper support (bsc#1175465).

Xen: Added support for passing arbitrary commands to the qemu device model, similar to the xl.cfg(5) device_model_args setting (bsc#1174139).

Xen: Don't add dom0 twice on driver reload (bsc#1176430).

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

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2020-5040 advisory.

    - rpc: gendispatch: handle empty flags (CVE-2020-25637)
    - rpc: add support for filtering @acls by uint params (CVE-2020-25637)
    - rpc: require write acl for guest agent in virDomainInterfaceAddresses (CVE-2020-25637)
    - qemu: agent: set ifname to NULL after freeing (CVE-2020-25637)

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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:5111 advisory.

    The Advanced Virtualization module provides the user-space component for running virtual machines that use     KVM in environments managed by Red Hat products.

    Security Fix(es):

    * libvirt: double free in qemuAgentGetInterfaces() in qemu_agent.c (CVE-2020-25637)

    * QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c     (CVE-2020-16092)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * virtiofsd core dump in KATA Container (BZ#1883869)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 libvirt packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A double free memory issue was found to occur in the     libvirt API, in versions before 6.8.0, responsible for     requesting information about network interfaces of a     running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting     to the read-write socket with limited ACL permissions     could use this flaw to crash the libvirt daemon,     resulting in a denial of service, or potentially     escalate their privileges on the system. The highest     threat from this vulnerability is to data     confidentiality and integrity as well as system     availability.(CVE-2020-25637)

  - A flaw was found in libvirt, where it leaked a file     descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged     operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or     process to perform operations outside of their standard     permissions, potentially causing serious damage to the     host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well     as system availability.(CVE-2020-14339)

  - An issue was discovered in qemuDomainGetStatsIOThread     in qemu/qemu_driver.c in libvirt 4.10.0 though 6.x     before 6.1.0. A memory leak was found in the     virDomainListGetStats libvirt API that is responsible     for retrieving domain statistics when managing QEMU     guests. This flaw allows unprivileged users with a     read-only connection to cause a memory leak in the     domstats command, resulting in a potential denial of     service.(CVE-2020-12430)

  - An information disclosure vulnerability was found in     libvirt. HTTP cookies used to access network-based     disks were saved in the XML dump of the guest domain.
    This flaw allows an attacker to access potentially     sensitive information in the domain configuration via     the `dumpxml` command.(CVE-2020-14301)

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 RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:1762 advisory.

    * libvirt: double free in qemuAgentGetInterfaces() in qemu_agent.c (CVE-2020-25637)

    * QEMU: heap buffer overflow in msix_table_mmio_write() in hw/pci/msix.c (CVE-2020-27821)

    * QEMU: ide: atapi: OOB access while processing read commands (CVE-2020-29443)

    * QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure     (CVE-2020-11947)

    * QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c     (CVE-2020-16092)

    * QEMU: infinite loop in e1000e_write_packet_to_guest() in hw/net/e1000e_core.c (CVE-2020-25707)

    * QEMU: assertion failure through usb_packet_unmap() in hw/usb/hcd-ehci.c (CVE-2020-25723)

    * QEMU: e1000e: infinite loop scenario in case of null packet descriptor (CVE-2020-28916)

    * QEMU: slirp: out-of-bounds access while processing ARP/NCSI packets (CVE-2020-29129, CVE-2020-29130)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3778 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3778-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Guilhem Moulin     April 01, 2024                                https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : libvirt     Version        : 5.0.0-4+deb10u2     CVE ID         : CVE-2020-10703 CVE-2020-12430 CVE-2020-25637 CVE-2021-3631                      CVE-2021-3667 CVE-2021-3975 CVE-2021-4147 CVE-2022-0897                      CVE-2024-1441 CVE-2024-2494 CVE-2024-2496     Debian Bug     : 959447 971555 990709 991594 1002535 1009075 1066058 1067461

    Multiple vulnerabilities were found in libvirt, a C toolkit to interact     with the virtualization capabilities of Linux, which could lead to     denial of service or information disclosure.

    CVE-2020-10703

        A NULL pointer dereference was found in the libvirt API that is responsible for         fetching a storage pool based on its target path.  In more detail, this flaw affects         storage pools created without a target path such as network-based pools like gluster         and RBD.  Unprivileged users with a read-only connection could abuse this flaw to         crash the libvirt daemon, resulting in a potential denial of service.

    CVE-2020-12430

        A memory leak was found in the virDomainListGetStats libvirt API that is responsible         for retrieving domain statistics when managing QEMU guests.  This flaw allows         unprivileged users with a read-only connection to cause a memory leak in the domstats         command, resulting in a potential denial of service.

    CVE-2020-25637

        A double free memory issue was found in the libvirt API that is responsible for         requesting information about network interfaces of a running QEMU domain.  This flaw         affects the polkit access control driver.  Specifically, clients connecting to the         read-write socket with limited ACL permissions could use this flaw to crash the         libvirt daemon, resulting in a denial of service, or potentially escalate their         privileges on the system.  The highest threat from this vulnerability is to data         confidentiality and integrity as well as system availability.

    CVE-2021-3631

        An issue was found in the generation of SELinux MCS category pairs for VMs' dynamic         labels.  This flaw allows one exploited guest to access files labeled for another         guest, resulting in the breaking out of sVirt confinement.

    CVE-2021-3667

        An improper locking issue was found in the virStoragePoolLookupByTargetPath API.  It         occurs in the storagePoolLookupByTargetPath function where a locked virStoragePoolObj         object is not properly released on ACL permission failure.  Clients connecting to the         read-write socket with limited ACL permissions could use this flaw to acquire the lock         and prevent other users from accessing storage pool/volume APIs, resulting in a denial         of service condition.

    CVE-2021-3975

        A use-after-free issue was found in libvirt in qemuProcessHandleMonitorEOF(), where         the qemuMonitorUnregister() function 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-2021-4147

        Jim Fehlig discovered that a malicious guest using the libxl driver could cause         libvirtd on the host to deadlock or crash when continuously rebooting itself.

    CVE-2022-0897

        A flaw was found in the libvirt nwfilter driver.  The virNWFilterObjListNumOfNWFilters         method failed to acquire the driver->nwfilters mutex before iterating over         virNWFilterObj instances.  There was no protection to stop another thread from         concurrently modifying the driver->nwfilters object.  This flaw allows a malicious,         unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to         crash the network filter management daemon (libvirtd/virtnwfilterd).

    CVE-2024-1441

        An off-by-one error flaw was found in the udevListInterfacesByStatus() function in         libvirt when the number of interfaces exceeds the size of the `names` array.  This         issue can be reproduced by sending specially crafted data to the libvirt daemon,         allowing an unprivileged client to perform a denial of service attack by causing the         libvirt daemon to crash.

    CVE-2024-2494

        The ALT Linux Team discovered that the RPC server deserialization code allocates         memory for arrays before the non-negative length check is performed by the C API entry         points.  Passing a negative length therefore results in a crash due to the negative         length being treated as a huge positive number.  This flaw allows a local,         unprivileged user to perform a denial of service attack by causing the libvirt daemon         to crash.

    CVE-2024-2496

        A NULL pointer dereference flaw was found in the udevConnectListAllInterfaces()         function.  This issue can occur when detaching a host interface while at the same time         collecting the list of interfaces via virConnectListAllInterfaces API.  This flaw         could be used to perform a denial of service attack by causing the libvirt daemon to         crash.

    For Debian 10 buster, these problems have been fixed in version     5.0.0-4+deb10u2.

    We recommend that you upgrade your libvirt packages.

    For the detailed security status of libvirt please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libvirt

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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 version of the libvirt packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - A double free memory issue was found to occur in the     libvirt API responsible for requesting information     about network interfaces of a running QEMU domain. This     flaw affects the polkit access control driver.
    Specifically, clients connecting to the read-write     socket with limited ACL permissions could use this flaw     to crash the libvirt daemon, resulting in a denial of     service, or potentially escalate their privileges on     the system. The highest threat from this vulnerability     is to data confidentiality and integrity as well as     system availability.(CVE-2020-25637)

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.

This update for libvirt fixes the following issues :

CVE-2020-15708: Added a note to libvirtd.conf about polkit auth in SUSE distros (bsc#1174955).

CVE-2020-25637: Fixed a double free in qemuAgentGetInterfaces() (bsc#1177155).

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

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2020-5961 advisory.

    - qemu: remove use of qemuDomainObjBeginJobWithAgent() (Jonathon Jongsma)  [Orabug: 31990187]     {CVE-2019-20485}
    - qemu: dont hold monitor and agent job when setting time (Jonathon Jongsma)  [Orabug: 31990187]     {CVE-2019-20485}
    - qemu: dont hold a monitor and agent job for reboot (Jonathon Jongsma)  [Orabug: 31990187]     {CVE-2019-20485}
    - qemu: dont take agent and monitor job for shutdown (Jonathon Jongsma)  [Orabug: 31990187]     {CVE-2019-20485}
    - qemu: agent: set ifname to NULL after freeing (Jan Tomko)  [Orabug: 31964426]  {CVE-2020-25637}
    - rpc: require write acl for guest agent in virDomainInterfaceAddresses (Jan Tomko)  [Orabug: 31964426]     {CVE-2020-25637}
    - rpc: add support for filtering @acls by uint params (Jan Tomko)  [Orabug: 31964426]  {CVE-2020-25637}
    - rpc: gendispatch: handle empty flags (Jan Tomko)  [Orabug: 31964426]  {CVE-2020-25637}

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 version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2022:0119 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2018-12130:
    Microarchitectural Fill Buffer Data Sampling (MFBDS): Fill buffers on some microprocessors utilizing     speculative execution may allow an authenticated user to potentially enable information disclosure via a     side channel with local access. A list of impacted products can be found here:
    https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-     update-guidance_05132019.pdf

    CVE-2018-13405:
    The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create     files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and     is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a     plain file whose group ownership is that group. The intended behavior was that the non-member can trigger     creation of a directory (but not a plain file) whose group ownership is that group. The non-member can     escalate privileges by making the plain file executable and SGID.

    CVE-2019-10132:
    A vulnerability was found in libvirt >= 4.1.0 in the virtlockd-admin.socket and virtlogd-admin.socket     systemd units. A missing SocketMode configuration parameter allows any user on the host to connect using     virtlockd-admin-sock or virtlogd-admin-sock and perform administrative tasks against the virtlockd and     virtlogd daemons.

    CVE-2019-10161:
    It was discovered that libvirtd before versions 4.10.1 and 5.4.1 would permit read-only clients to use the     virDomainSaveImageGetXMLDesc() API, specifying an arbitrary path which would be accessed with the     permissions of the libvirtd process. An attacker with access to the libvirtd socket could use this to     probe the existence of arbitrary files, cause denial of service or cause libvirtd to execute arbitrary     programs.

    CVE-2019-10166:
    It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit     readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed     save state files. If a managed save had already been created by a privileged user, a local attacker could     modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.

    CVE-2019-10167:
    The virConnectGetDomainCapabilities() libvirt API, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1,     accepts an emulatorbin argument to specify the program providing emulation for a domain. Since v1.2.19,     libvirt will execute that program to probe the domain's capabilities. Read-only clients could specify an     arbitrary path for this argument, causing libvirtd to execute a crafted executable with its own     privileges.

    CVE-2019-10168:
    The virConnectBaselineHypervisorCPU() and virConnectCompareHypervisorCPU() libvirt APIs, 4.x.x before     4.10.1 and 5.x.x before 5.4.1, accept an emulator argument to specify the program providing emulation     for a domain. Since v1.2.19, libvirt will execute that program to probe the domain's capabilities. Read-     only clients could specify an arbitrary path for this argument, causing libvirtd to execute a crafted     executable with its own privileges.

    CVE-2019-11135:
    TSX Asynchronous Abort condition on some CPUs utilizing speculative execution may allow an authenticated     user to potentially enable information disclosure via a side channel with local access.

    CVE-2019-12155:
    interface_release_resource in hw/display/qxl.c in QEMU 3.1.x through 4.0.0 has a NULL pointer dereference.

    CVE-2019-14378:
    ip_reass in ip_input.c in libslirp 4.0.0 has a heap-based buffer overflow via a large packet because it     mishandles a case involving the first fragment.

    CVE-2019-14842:
    Structured reply is a feature of the newstyle NBD protocol allowing the server to send a reply in chunks.
    A bounds check which was supposed to test for chunk offsets smaller than the beginning of the request did     not work because of signed/unsigned confusion. If one of these chunks contains a negative offset then data     under control of the server is written to memory before the read buffer supplied by the client. If the     read buffer is located on the stack then this allows the stack return address from nbd_pread() to be     trivially modified, allowing arbitrary code execution under the control of the server. If the buffer is     located on the heap then other memory objects before the buffer can be overwritten, which again would     usually lead to arbitrary code execution.

    CVE-2019-15890:
    libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c.

    CVE-2019-20485:
    qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage).

    CVE-2019-6501:
    In QEMU 3.1, scsi_handle_inquiry_reply in hw/scsi/scsi-generic.c allows out-of-bounds write and read     operations.

    CVE-2019-6778:
    In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.

    CVE-2020-10703:
    A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service.

    CVE-2020-10756:
    An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator.
    This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known     as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible     information disclosure. This flaw affects versions of libslirp before 4.3.1.

    CVE-2020-11947:
    iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose     unrelated information from process memory to an attacker.

    CVE-2020-14301:
    An information disclosure vulnerability was found in libvirt in versions before 6.3.0. HTTP cookies used     to access network-based disks were saved in the XML dump of the guest domain. This flaw allows an attacker     to access potentially sensitive information in the domain configuration via the `dumpxml` command.

    CVE-2020-14339:
    A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or process to perform operations outside of their standard     permissions, potentially causing serious damage to the host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well as system availability.

    CVE-2020-14364:
    An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before     5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its     'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the     QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the     privileges of the QEMU process on the host.

    CVE-2020-15859:
    QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address.

    CVE-2020-16092:
    In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects     the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the     QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in     hw/net/net_tx_pkt.c.

    CVE-2020-1711:
    An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions     2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical     Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the     QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of     the QEMU process on the host.

    CVE-2020-1983:
    A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of service.

    CVE-2020-25637:
    A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible     for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting to the read-write socket with limited ACL     permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or     potentially escalate their privileges on the system. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability.

    CVE-2020-25723:
    A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while     processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user     within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,     resulting in a denial of service.

    CVE-2020-27821:
    A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.
    This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO     operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial     of service. This flaw affects QEMU versions prior to 5.2.0.

    CVE-2020-28916:
    hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.

    CVE-2020-29130:
    slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length.

    CVE-2020-29443:
    ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer     index is not validated.

    CVE-2020-7039:
    tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC     DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which     can lead to a DoS or potential execute arbitrary code.

    CVE-2021-20257:
    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-2021-3592:
    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-2021-3593:
    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-2021-3594:
    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-2021-3595:
    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-2021-3631:
    A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.

    CVE-2021-3667:
    An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability.

    CVE-2021-3930:
    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.

Tenable has extracted the preceding description block directly from the Tencent 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.

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2021-2165:01 advisory.

    * libvirt: double free in qemuAgentGetInterfaces() in qemu_agent.c (CVE-2020-     25637)
      * QEMU: heap buffer overflow in msix_table_mmio_write() in hw/pci/msix.c     (CVE-2020-27821)
      * QEMU: ide: atapi: OOB access while processing read commands (CVE-2020-29443)
      * QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead     to information disclosure (CVE-2020-11947)
      * QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in     hw/net/net_tx_pkt.c (CVE-2020-16092)
      * QEMU: infinite loop in e1000e_write_packet_to_guest() in     hw/net/e1000e_core.c (CVE-2020-25707)
      * QEMU: assertion failure through usb_packet_unmap() in hw/usb/hcd-ehci.c     (CVE-2020-25723)
      * QEMU: e1000e: infinite loop scenario in case of null packet descriptor     (CVE-2020-28916)
      * QEMU: slirp: out-of-bounds access while processing ARP/NCSI packets     (CVE-2020-29129, CVE-2020-29130)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-1762 advisory.

    - Resolves: bz#1917451       (CVE-2020-29443 virt:rhel/qemu-kvm: QEMU: ide: atapi: OOB access while processing read commands     [rhel-8.4.0])
    - Resolves: bz#1919111       (CVE-2020-35517 virt:rhel/qemu-kvm: QEMU: virtiofsd: potential privileged host device access from guest     [rhel-8.4.0])
    - Resolves: bz#1912974       (CVE-2020-11947 virt:rhel/qemu-kvm: QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c     may lead to information disclosure [rhel-8])
    - Resolves: bz#1918054       (CVE-2020-10756 virt:rhel/qemu-kvm: QEMU: slirp: networking out-of-bounds read information disclosure     vulnerability [rhel-8.4.0])
    - Resolves: bz#1904393       (CVE-2020-27821 virt:rhel/qemu-kvm: QEMU: heap buffer overflow in msix_table_mmio_write() in     hw/pci/msix.c [rhel-8])
    - Resolves: bz#1898628       (CVE-2020-25723 virt:rhel/qemu-kvm: QEMU: assertion failure through usb_packet_unmap() in hw/usb/hcd-     ehci.c [rhel-8])
    - Resolves: bz#1903070       (CVE-2020-25707 CVE-2020-28916 virt:rhel/qemu-kvm: various flaws [rhel-8])
    - Resolves: bz#1902237       (CVE-2020-29129 CVE-2020-29130 virt:rhel/qemu-kvm: QEMU: slirp: out-of-bounds access while processing     ARP/NCSI packets [rhel-8])
    - Resolves: bz#1860994       (CVE-2020-16092 virt:rhel/qemu-kvm: QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment()     in hw/net/net_tx_pkt.c [rhel-8])

Tenable has extracted the preceding description block directly from the Oracle 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.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:1762 advisory.

    * libvirt: double free in qemuAgentGetInterfaces() in qemu_agent.c (CVE-2020-25637)

    * QEMU: heap buffer overflow in msix_table_mmio_write() in hw/pci/msix.c (CVE-2020-27821)

    * QEMU: ide: atapi: OOB access while processing read commands (CVE-2020-29443)

    * QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure     (CVE-2020-11947)

    * QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c     (CVE-2020-16092)

    * QEMU: infinite loop in e1000e_write_packet_to_guest() in hw/net/e1000e_core.c (CVE-2020-25707)

    * QEMU: assertion failure through usb_packet_unmap() in hw/usb/hcd-ehci.c (CVE-2020-25723)

    * QEMU: e1000e: infinite loop scenario in case of null packet descriptor (CVE-2020-28916)

    * QEMU: slirp: out-of-bounds access while processing ARP/NCSI packets (CVE-2020-29129, CVE-2020-29130)

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 version of AHV installed on the remote host is prior to 20201105.1021. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-20201105.1021 advisory.

  - In Network Security Services (NSS) before 3.46, several cryptographic primitives had missing length     checks. In cases where the application calling the library did not perform a sanity check on the inputs it     could result in a crash due to a buffer overflow. (CVE-2019-17006)

  - Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3. (CVE-2019-5482)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported     versions that are affected are 5.6.45 and prior, 5.7.27 and prior and 8.0.17 and prior. Easily exploitable     vulnerability allows low privileged attacker with network access via multiple protocols to compromise     MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of MySQL Server. (CVE-2019-2974)

  - Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are     affected are 5.6.46 and prior, 5.7.28 and prior and 8.0.18 and prior. Difficult to exploit vulnerability     allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Client.
    Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently     repeatable crash (complete DOS) of MySQL Client. (CVE-2020-2574)

  - Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are     affected are 5.6.47 and prior, 5.7.27 and prior and 8.0.17 and prior. Difficult to exploit vulnerability     allows low privileged attacker with network access via multiple protocols to compromise MySQL Client.
    Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently     repeatable crash (complete DOS) of MySQL Client. (CVE-2020-2752)

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
142188	openSUSE Security Update : libvirt (openSUSE-2020-1778)	Nessus	SuSE Local Security Checks	2020/11/2	2024/2/13	high
143884	SUSE SLED15 / SLES15 Security Update : libvirt (SUSE-SU-2020:2970-1)	Nessus	SuSE Local Security Checks	2020/12/9	2022/5/11	high
142784	Oracle Linux 7 : libvirt (ELSA-2020-5040)	Nessus	Oracle Linux Local Security Checks	2020/11/12	2024/11/1	medium
142982	RHEL 8 : virt:8.2 and virt-devel:8.2 (RHSA-2020:5111)	Nessus	Red Hat Local Security Checks	2020/11/18	2024/11/7	medium
147481	EulerOS Virtualization 2.9.1 : libvirt (EulerOS-SA-2021-1631)	Nessus	Huawei Local Security Checks	2021/3/10	2022/5/10	high
184965	RockyLinux 8 : virt:rhel and virt-devel:rhel (RLSA-2021:1762)	Nessus	Rocky Linux Local Security Checks	2023/11/7	2025/9/24	medium
192736	Debian dla-3778 : libnss-libvirt - security update	Nessus	Debian Local Security Checks	2024/4/1	2025/5/16	medium
147104	EulerOS Virtualization for ARM 64 3.0.6.0 : libvirt (EulerOS-SA-2021-1526)	Nessus	Huawei Local Security Checks	2021/3/4	2024/1/16	medium
147678	EulerOS Virtualization 2.9.0 : libvirt (EulerOS-SA-2021-1666)	Nessus	Huawei Local Security Checks	2021/3/11	2022/5/10	high
143851	SUSE SLES12 Security Update : libvirt (SUSE-SU-2020:3143-1)	Nessus	SuSE Local Security Checks	2020/12/9	2022/5/11	high
146198	Oracle Linux 7 : libvirt (ELSA-2020-5961)	Nessus	Oracle Linux Local Security Checks	2021/2/4	2024/10/22	medium
276357	TencentOS Server 3: virt:rhel and virt-devel:rhel (TSSA-2022:0119)	Nessus	Tencent Local Security Checks	2025/11/20	2025/12/5	critical
291723	MiracleLinux 8 : virt:rhel and virt-devel:rhel (AXSA:2021-2165:01)	Nessus	Miracle Linux Local Security Checks	2026/1/19	2026/1/19	medium
155325	Oracle Linux 8 : virt:ol / and / virt-devel:rhel (ELSA-2021-1762)	Nessus	Oracle Linux Local Security Checks	2021/11/12	2025/9/23	medium
157696	AlmaLinux 8 : virt:rhel and virt-devel:rhel (ALSA-2021:1762)	Nessus	Alma Linux Local Security Checks	2022/2/9	2025/9/23	medium
164552	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-20201105.1021)	Nessus	Misc.	2022/9/1	2025/2/19	critical

检测

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