Ubuntu 18.04 LTS / 18.10 / 19.04 : FFmpeg vulnerabilities (USN-3967-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3967-1. 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(124678);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/21");

  script_cve_id("CVE-2018-15822", "CVE-2019-11338", "CVE-2019-11339", "CVE-2019-9718", "CVE-2019-9721");
  script_xref(name:"USN", value:"3967-1");

  script_name(english:"Ubuntu 18.04 LTS / 18.10 / 19.04 : FFmpeg vulnerabilities (USN-3967-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that FFmpeg contained multiple security issues when
handling certain multimedia files. If a user were tricked into opening
a crafted multimedia file, an attacker could cause a denial of service
via application crash.

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://usn.ubuntu.com/3967-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  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: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: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-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: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: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: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: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: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: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:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(18\.04|18\.10|19\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 18.04 / 18.10 / 19.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

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

flag = 0;

if (ubuntu_check(osver:"18.04", pkgname:"ffmpeg", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavcodec-extra57", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavcodec57", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavdevice57", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavfilter-extra6", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavfilter6", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavformat57", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavresample3", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libavutil55", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libpostproc54", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libswresample2", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libswscale4", pkgver:"7:3.4.6-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"ffmpeg", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavcodec-extra58", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavcodec58", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavdevice58", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavfilter-extra7", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavfilter7", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavformat58", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavresample4", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libavutil56", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libpostproc55", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libswresample3", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libswscale5", pkgver:"7:4.0.4-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"ffmpeg", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavcodec-extra58", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavcodec58", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavdevice58", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavfilter-extra7", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavfilter7", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavformat58", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavresample4", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libavutil56", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libpostproc55", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libswresample3", pkgver:"7:4.1.3-0ubuntu1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libswscale5", pkgver:"7:4.1.3-0ubuntu1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ffmpeg / libavcodec-extra57 / libavcodec-extra58 / libavcodec57 / etc");
}