Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : GStreamer Good Plugins vulnerability (USN-8778-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8778-1. 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(350309);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/25");

  script_cve_id("CVE-2026-18649");
  script_xref(name:"USN", value:"8778-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : GStreamer Good Plugins vulnerability (USN-8778-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that
are affected by a vulnerability as referenced in the USN-8778-1 advisory.

    It was discovered that GStreamer Good Plugins did not limit the size of reassembly buffers when processing
    fragmented RTP packets. A remote attacker could possibly use this issue to cause GStreamer Good Plugins to
    use excessive resources, leading to a denial of service.

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-8778-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/I:N/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-2026-18649");

  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:"2026/08/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:"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:"p-cpe:/a:canonical:ubuntu_linux:gstreamer1.0-gtk3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gstreamer1.0-plugins-good");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gstreamer1.0-pulseaudio");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gstreamer1.0-qt5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gstreamer1.0-qt6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgstreamer-plugins-good1.0-0");
  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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04 / 24.04 / 26.04', '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': 'gstreamer1.0-plugins-good', 'pkgver': '1.8.3-1ubuntu0.5+esm2'},
    {'osver': '16.04', 'pkgname': 'gstreamer1.0-pulseaudio', 'pkgver': '1.8.3-1ubuntu0.5+esm2'},
    {'osver': '16.04', 'pkgname': 'libgstreamer-plugins-good1.0-0', 'pkgver': '1.8.3-1ubuntu0.5+esm2'},
    {'osver': '18.04', 'pkgname': 'gstreamer1.0-gtk3', 'pkgver': '1.14.5-0ubuntu1~18.04.3+esm2'},
    {'osver': '18.04', 'pkgname': 'gstreamer1.0-plugins-good', 'pkgver': '1.14.5-0ubuntu1~18.04.3+esm2'},
    {'osver': '18.04', 'pkgname': 'gstreamer1.0-pulseaudio', 'pkgver': '1.14.5-0ubuntu1~18.04.3+esm2'},
    {'osver': '18.04', 'pkgname': 'gstreamer1.0-qt5', 'pkgver': '1.14.5-0ubuntu1~18.04.3+esm2'},
    {'osver': '18.04', 'pkgname': 'libgstreamer-plugins-good1.0-0', 'pkgver': '1.14.5-0ubuntu1~18.04.3+esm2'},
    {'osver': '20.04', 'pkgname': 'gstreamer1.0-gtk3', 'pkgver': '1.16.3-0ubuntu1.3+esm2'},
    {'osver': '20.04', 'pkgname': 'gstreamer1.0-plugins-good', 'pkgver': '1.16.3-0ubuntu1.3+esm2'},
    {'osver': '20.04', 'pkgname': 'gstreamer1.0-pulseaudio', 'pkgver': '1.16.3-0ubuntu1.3+esm2'},
    {'osver': '20.04', 'pkgname': 'gstreamer1.0-qt5', 'pkgver': '1.16.3-0ubuntu1.3+esm2'},
    {'osver': '20.04', 'pkgname': 'libgstreamer-plugins-good1.0-0', 'pkgver': '1.16.3-0ubuntu1.3+esm2'},
    {'osver': '22.04', 'pkgname': 'gstreamer1.0-gtk3', 'pkgver': '1.20.3-0ubuntu1.8'},
    {'osver': '22.04', 'pkgname': 'gstreamer1.0-plugins-good', 'pkgver': '1.20.3-0ubuntu1.8'},
    {'osver': '22.04', 'pkgname': 'gstreamer1.0-pulseaudio', 'pkgver': '1.20.3-0ubuntu1.8'},
    {'osver': '22.04', 'pkgname': 'gstreamer1.0-qt5', 'pkgver': '1.20.3-0ubuntu1.8'},
    {'osver': '22.04', 'pkgname': 'libgstreamer-plugins-good1.0-0', 'pkgver': '1.20.3-0ubuntu1.8'},
    {'osver': '24.04', 'pkgname': 'gstreamer1.0-gtk3', 'pkgver': '1.24.2-1ubuntu1.6'},
    {'osver': '24.04', 'pkgname': 'gstreamer1.0-plugins-good', 'pkgver': '1.24.2-1ubuntu1.6'},
    {'osver': '24.04', 'pkgname': 'gstreamer1.0-pulseaudio', 'pkgver': '1.24.2-1ubuntu1.6'},
    {'osver': '24.04', 'pkgname': 'gstreamer1.0-qt5', 'pkgver': '1.24.2-1ubuntu1.6'},
    {'osver': '24.04', 'pkgname': 'gstreamer1.0-qt6', 'pkgver': '1.24.2-1ubuntu1.6'},
    {'osver': '24.04', 'pkgname': 'libgstreamer-plugins-good1.0-0', 'pkgver': '1.24.2-1ubuntu1.6'},
    {'osver': '26.04', 'pkgname': 'gstreamer1.0-gtk3', 'pkgver': '1.28.2-2ubuntu0.2'},
    {'osver': '26.04', 'pkgname': 'gstreamer1.0-plugins-good', 'pkgver': '1.28.2-2ubuntu0.2'},
    {'osver': '26.04', 'pkgname': 'gstreamer1.0-pulseaudio', 'pkgver': '1.28.2-2ubuntu0.2'},
    {'osver': '26.04', 'pkgname': 'gstreamer1.0-qt5', 'pkgver': '1.28.2-2ubuntu0.2'},
    {'osver': '26.04', 'pkgname': 'gstreamer1.0-qt6', 'pkgver': '1.28.2-2ubuntu0.2'}
];

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, 'gstreamer1.0-gtk3 / gstreamer1.0-plugins-good / etc');
}