Ubuntu 18.04 ESM / 20.04 ESM / 22.04 ESM : FFmpeg regression (USN-6449-2)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6449-2. 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(185738);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");
  script_xref(name:"USN", value:"6449-2");

  script_name(english:"Ubuntu 18.04 ESM / 20.04 ESM / 22.04 ESM : FFmpeg regression (USN-6449-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 ESM / 20.04 ESM / 22.04 ESM host has packages installed that are affected by a vulnerability as
referenced in the USN-6449-2 advisory.

    USN-6449-1 fixed vulnerabilities in FFmpeg. Unfortunately that update could introduce a regression in
    tools using an FFmpeg library, like VLC.

    This updated fixes the problem. We apologize for the inconvenience.

    Original advisory details:

    It was discovered that FFmpeg incorrectly managed memory resulting

    in a memory leak. An attacker could possibly use this issue to cause a denial of service via application
    crash. This issue only

    affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-22038)

    It was discovered that FFmpeg incorrectly handled certain input files,

    leading to an integer overflow. An attacker could possibly use this issue to cause a denial of service via
    application crash. This issue only

    affected Ubuntu 20.04 LTS. (CVE-2020-20898, CVE-2021-38090,

    CVE-2021-38091, CVE-2021-38092, CVE-2021-38093, CVE-2021-38094)

    It was discovered that FFmpeg incorrectly managed memory, resulting in a memory leak.

    If a user or automated system were tricked into

    processing a specially crafted input file, a remote attacker could possibly use this issue to cause a
    denial of service, or execute

    arbitrary code. (CVE-2022-48434)

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

Note that Nessus has not tested for this issue 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-6449-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"None");

  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:"2023/11/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/11/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:esm");
  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-dev");
  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-extra57");
  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:libavcodec57");
  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:libavdevice-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavdevice57");
  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-dev");
  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-extra6");
  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:libavfilter6");
  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-dev");
  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:libavformat57");
  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:libavresample-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavresample3");
  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:libavutil-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavutil55");
  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:libpostproc-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpostproc54");
  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:libswresample-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libswresample2");
  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:libswscale-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libswscale4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libswscale5");
  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) 2023-2024 Canonical, Inc. / NASL script (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.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 (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 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 ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '18.04', 'pkgname': 'ffmpeg', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavcodec-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavcodec-extra57', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavcodec57', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavdevice-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavdevice57', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavfilter-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavfilter-extra', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavfilter-extra6', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavfilter6', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavformat-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavformat57', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavresample-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavresample3', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavutil-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libavutil55', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libpostproc-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libpostproc54', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libswresample-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libswresample2', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libswscale-dev', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libswscale4', 'pkgver': '7:3.4.11-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'ffmpeg', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavcodec-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavcodec-extra58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavcodec58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavdevice-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavdevice58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavfilter-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavfilter-extra', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavfilter-extra7', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavfilter7', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavformat-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavformat58', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavresample-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavresample4', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavutil-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libavutil56', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libpostproc-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libpostproc55', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libswresample-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libswresample3', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libswscale-dev', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libswscale5', 'pkgver': '7:4.2.7-0ubuntu0.1+esm4', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'ffmpeg', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavcodec-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavcodec-extra58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavcodec58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavdevice-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavdevice58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavfilter-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavfilter-extra', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavfilter-extra7', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavfilter7', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavformat-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavformat-extra', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavformat-extra58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavformat58', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavutil-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libavutil56', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libpostproc-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libpostproc55', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libswresample-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libswresample3', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libswscale-dev', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libswscale5', 'pkgver': '7:4.4.2-0ubuntu0.22.04.1+esm3', 'ubuntu_pro': TRUE}
];

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'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) {
        flag++;
        if (!ubuntu_pro_detected && !pro_caveat_needed) pro_caveat_needed = pro_required;
    }
  }
}

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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-dev / libavcodec-extra / libavcodec-extra57 / etc');
}