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
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    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.

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Debian dla-3778 : libnss-libvirt - security update

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