Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : AOM vulnerabilities (USN-8772-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8772-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(346813);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/17");

  script_cve_id(
    "CVE-2026-56208",
    "CVE-2026-56209",
    "CVE-2026-56210",
    "CVE-2026-56211"
  );
  script_xref(name:"USN", value:"8772-1");

  script_name(english:"Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : AOM vulnerabilities (USN-8772-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS host has packages installed that are
affected by multiple vulnerabilities as referenced in the USN-8772-1 advisory.

    It was discovered that AOM incorrectly handled the first-pass statistics buffer in Look-Ahead Processing
    (LAP) mode. An attacker could possibly use this issue to cause a heap buffer overflow, leading to a denial
    of service or possibly execute arbitrary code. (CVE-2026-56208)

    It was discovered that AOM incorrectly validated spatial and temporal layer IDs in the SVC (Scalable Video
    Coding) encoder controls. An attacker could possibly use this issue to write to an arbitrary memory
    address, read out-of-bounds heap memory, or execute arbitrary code. (CVE-2026-56209, CVE-2026-56210,
    CVE-2026-56211)

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

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://ubuntu.com/security/notices/USN-8772-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected aom-tools and / or libaom3 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-56209");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-56208");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/06/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:Pro:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:aom-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libaom3");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('22.04' >< os_release || '24.04' >< os_release || '26.04' >< os_release || 'Pro' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 24.04 / 26.04 / Pro', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '22.04', 'pkgname': 'aom-tools', 'pkgver': '3.3.0-1ubuntu0.1+esm1'},
    {'osver': '22.04', 'pkgname': 'libaom3', 'pkgver': '3.3.0-1ubuntu0.1+esm1'},
    {'osver': '24.04', 'pkgname': 'aom-tools', 'pkgver': '3.8.2-2ubuntu0.2'},
    {'osver': '24.04', 'pkgname': 'libaom3', 'pkgver': '3.8.2-2ubuntu0.2'},
    {'osver': '26.04', 'pkgname': 'aom-tools', 'pkgver': '3.13.1-2ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libaom3', 'pkgver': '3.13.1-2ubuntu0.1'},
    {'osver': 'Pro', 'pkgname': 'aom-tools', 'pkgver': '3.8.2-2ubuntu0.2'},
    {'osver': 'Pro', 'pkgname': 'libaom3', 'pkgver': '3.8.2-2ubuntu0.2'}
];

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

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'aom-tools / libaom3');
}