Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : FFmpeg vulnerabilities (USN-4431-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4431-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(138875);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/21");

  script_cve_id(
    "CVE-2018-15822",
    "CVE-2019-11338",
    "CVE-2019-12730",
    "CVE-2019-13312",
    "CVE-2019-13390",
    "CVE-2019-17539",
    "CVE-2019-17542",
    "CVE-2020-12284",
    "CVE-2020-13904"
  );
  script_xref(name:"USN", value:"4431-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : FFmpeg vulnerabilities (USN-4431-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"It was discovered that FFmpeg incorrectly verified empty audio packets
or HEVC data. An attacker could possibly use this issue to cause a
denial of service via a crafted file. This issue only affected Ubuntu
16.04 LTS, as it was already fixed in Ubuntu 18.04 LTS. For more
information see: https://usn.ubuntu.com/usn/usn-3967-1
(CVE-2018-15822, CVE-2019-11338) It was discovered that FFmpeg
incorrectly handled sscanf failures. An attacker could possibly use
this issue to cause a denial of service or other unspecified impact.
This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
(CVE-2019-12730) It was discovered that FFmpeg incorrectly handled
certain WEBM files. An attacker could possibly use this issue to
obtain sensitive data or other unspecified impact. This issue only
affected Ubuntu 20.04 LTS. (CVE-2019-13312) It was discovered that
FFmpeg incorrectly handled certain AVI files. An attacker could
possibly use this issue to cause a denial of service or other
unspecified impact. This issue only affected Ubuntu 16.04 LTS and
Ubuntu 18.04 LTS. (CVE-2019-13390) It was discovered that FFmpeg
incorrectly handled certain input. An attacker could possibly use this
issue to cause a denial of service or other unspecified impact. This
issue only affected Ubuntu 18.04 LTS. (CVE-2019-17539) It was
discovered that FFmpeg incorrectly handled certain input during
decoding of VQA files. An attacker could possibly use this issue to
obtain sensitive information or other unspecified impact. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-17542)
It was discovered that FFmpeg incorrectly handled certain JPEG files.
An attacker could possibly use this issue to obtain sensitive
information or other unspecified impact. This issue only affected
Ubuntu 20.04 LTS. (CVE-2020-12284) It was discovered that FFmpeg
incorrectly handled certain M3U8 files. An attacker could possibly use
this issue to obtain sensitive information or other unspecified
impact. (CVE-2020-13904).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-4431-1");
  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: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-2020-12284");

  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:"2018/08/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:libav-tools");
  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:libavcodec-ffmpeg-extra56");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libavcodec-ffmpeg56");
  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:libavdevice-ffmpeg56");
  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:libavfilter-ffmpeg5");
  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-ffmpeg56");
  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:libavresample-ffmpeg2");
  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:libavutil-ffmpeg54");
  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:libpostproc-ffmpeg53");
  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:libswresample-ffmpeg1");
  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:libswscale-ffmpeg3");
  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:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  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) 2020-2023 Canonical, Inc. / NASL script (C) 2020-2023 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04', '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': '16.04', 'pkgname': 'ffmpeg', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libav-tools', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavcodec-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavcodec-ffmpeg-extra56', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavcodec-ffmpeg56', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavdevice-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavdevice-ffmpeg56', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavfilter-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavfilter-ffmpeg5', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavformat-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavformat-ffmpeg56', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavresample-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavresample-ffmpeg2', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavutil-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libavutil-ffmpeg54', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libpostproc-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libpostproc-ffmpeg53', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libswresample-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libswresample-ffmpeg1', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libswscale-dev', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '16.04', 'pkgname': 'libswscale-ffmpeg3', 'pkgver': '7:2.8.17-0ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'ffmpeg', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavcodec-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavcodec-extra57', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavcodec57', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavdevice-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavdevice57', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavfilter-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavfilter-extra', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavfilter-extra6', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavfilter6', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavformat-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavformat57', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavresample-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavresample3', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavutil-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libavutil55', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libpostproc-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libpostproc54', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libswresample-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libswresample2', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libswscale-dev', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '18.04', 'pkgname': 'libswscale4', 'pkgver': '7:3.4.8-0ubuntu0.2'},
    {'osver': '20.04', 'pkgname': 'ffmpeg', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavcodec-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavcodec-extra', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavcodec-extra58', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavcodec58', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavdevice-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavdevice58', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavfilter-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavfilter-extra', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavfilter-extra7', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavfilter7', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavformat-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavformat58', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavresample-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavresample4', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavutil-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libavutil56', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libpostproc-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libpostproc55', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libswresample-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libswresample3', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libswscale-dev', 'pkgver': '7:4.2.4-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libswscale5', 'pkgver': '7:4.2.4-1ubuntu0.1'}
];

var flag = 0;
foreach 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 (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ffmpeg / libav-tools / libavcodec-dev / libavcodec-extra / etc');
}