Ubuntu 20.04 LTS / 22.04 LTS : FFmpeg vulnerabilities (USN-8750-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8750-1. 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(345735);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/14");

  script_cve_id(
    "CVE-2026-8461",
    "CVE-2026-12706",
    "CVE-2026-30999",
    "CVE-2026-58049",
    "CVE-2026-70629",
    "CVE-2026-70630",
    "CVE-2026-70631"
  );
  script_xref(name:"IAVB", value:"2026-B-0094-S");
  script_xref(name:"IAVB", value:"2026-B-0169-S");
  script_xref(name:"IAVB", value:"2026-B-0227");
  script_xref(name:"USN", value:"8750-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS : FFmpeg vulnerabilities (USN-8750-1)");

  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 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-8750-1 advisory.

    Seung Min Shin discovered that FFmpeg did not correctly handle certain memory operations. If a user or
    automated system were tricked into opening a specially crafted file, an attacker could cause a denial of
    service. (CVE-2026-12706)

    Xinghang Lv discovered that FFmpeg did not correctly handle certain memory operations. If a user or
    automated system were tricked into opening a specially crafted file, an attacker could cause a denial of
    service. (CVE-2026-30999)

    It was discovered that FFmpeg did not correctly handle certain memory operations. If a user or automated
    system were tricked into opening a specially crafted file, an attacker could cause a denial of service.
    (CVE-2026-58049)

    Adrian Junge discovered that FFmpeg did not correctly handle certain memory operations. If a user or
    automated system were tricked into opening a specially crafted file, an attacker could leak sensitive
    information. (CVE-2026-70629, CVE-2026-70630, CVE-2026-70631)

    Ori Hollander discovered that FFmpeg did not correctly handle certain memory operations. If a user or
    automated system were tricked into opening a specially crafted file, an attacker could possibly cause a
    denial of service or execute arbitrary code. (CVE-2026-8461)

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-8750-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/UI:R/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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-8461");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-58049");

  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:"2026/04/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ffmpeg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavcodec-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavcodec-extra58");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavcodec58");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavdevice58");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavfilter-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavfilter-extra7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavfilter7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavformat-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavformat-extra58");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavformat58");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavresample4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavutil56");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpostproc55");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libswresample3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libswscale5");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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 (! ('20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04', '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': '20.04', 'pkgname': 'ffmpeg', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavcodec-extra58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavcodec58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavdevice58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavfilter-extra', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavfilter-extra7', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavfilter7', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavformat58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavresample4', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libavutil56', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libpostproc55', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libswresample3', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '20.04', 'pkgname': 'libswscale5', 'pkgver': '7:4.2.7-0ubuntu0.1+esm17'},
    {'osver': '22.04', 'pkgname': 'ffmpeg', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavcodec-extra58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavcodec58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavdevice58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavfilter-extra', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavfilter-extra7', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavfilter7', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavformat-extra', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavformat-extra58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavformat58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libavutil56', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libpostproc55', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libswresample3', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'},
    {'osver': '22.04', 'pkgname': 'libswscale5', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm16'}
];

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, 'ffmpeg / libavcodec-extra / libavcodec-extra58 / libavcodec58 / etc');
}