Debian dla-3778 : libnss-libvirt - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3778. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(192736);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/01");

  script_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"
  );
  script_xref(name:"IAVA", value:"2024-A-0184");

  script_name(english:"Debian dla-3778 : libnss-libvirt - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-3778 advisory.

  - 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-2020-10703)

  - 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)

  - 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 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-2021-3631)

  - 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-2021-3667)

  - 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-2021-3975)

  - A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause
    libvirtd on the host to deadlock or crash, resulting in a denial of service condition. (CVE-2021-4147)

  - 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-2022-0897)

  - 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-2024-1441)

  - A flaw was found in the RPC library APIs of libvirt. 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 to the g_new0 function 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-2024-2494)

  - A NULL pointer dereference flaw was found in the udevConnectListAllInterfaces() function in libvirt. 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. (CVE-2024-2496)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/libvirt");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-10703");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-12430");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-25637");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3631");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3667");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3975");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-4147");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-0897");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-1441");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-2494");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-2496");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/libvirt");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libnss-libvirt packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25637");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/04/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss-libvirt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-daemon-driver-storage-gluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-daemon-driver-storage-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-daemon-driver-storage-zfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-daemon-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-sanlock");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt-wireshark");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvirt0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(10)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'libnss-libvirt', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-clients', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-daemon', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-daemon-driver-storage-gluster', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-daemon-driver-storage-rbd', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-daemon-driver-storage-zfs', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-daemon-system', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-dev', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-doc', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-sanlock', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt-wireshark', 'reference': '5.0.0-4+deb10u2'},
    {'release': '10.0', 'prefix': 'libvirt0', 'reference': '5.0.0-4+deb10u2'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libnss-libvirt / libvirt-clients / libvirt-daemon / etc');
}