Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 : GIFLIB vulnerabilities (USN-6824-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6824-1. 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(200257);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/10");

  script_cve_id("CVE-2021-40633", "CVE-2022-28506", "CVE-2023-39742");
  script_xref(name:"USN", value:"6824-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 : GIFLIB vulnerabilities (USN-6824-1)");

  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 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by
multiple vulnerabilities as referenced in the USN-6824-1 advisory.

    It was discovered that GIFLIB incorrectly handled certain GIF files. An attacker could possibly use this
    issue to cause a denial of service. (CVE-2021-40633, CVE-2022-28506, CVE-2023-39742)

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-6824-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected giflib-tools, libgif-dev and / or libgif7 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P");
  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:"cvss_score_source", value:"CVE-2021-40633");

  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:"2022/04/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/06/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/06/10");

  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:23.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:giflib-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgif-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgif7");
  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) 2024 Canonical, Inc. / NASL script (C) 2024 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 || '23.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04 / 23.10', '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': 'giflib-tools', 'pkgver': '5.1.4-0.3~16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libgif-dev', 'pkgver': '5.1.4-0.3~16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libgif7', 'pkgver': '5.1.4-0.3~16.04.1+esm1'},
    {'osver': '18.04', 'pkgname': 'giflib-tools', 'pkgver': '5.1.4-2ubuntu0.1+esm1'},
    {'osver': '18.04', 'pkgname': 'libgif-dev', 'pkgver': '5.1.4-2ubuntu0.1+esm1'},
    {'osver': '18.04', 'pkgname': 'libgif7', 'pkgver': '5.1.4-2ubuntu0.1+esm1'},
    {'osver': '20.04', 'pkgname': 'giflib-tools', 'pkgver': '5.1.9-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libgif-dev', 'pkgver': '5.1.9-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libgif7', 'pkgver': '5.1.9-1ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'giflib-tools', 'pkgver': '5.1.9-2ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'libgif-dev', 'pkgver': '5.1.9-2ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'libgif7', 'pkgver': '5.1.9-2ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'giflib-tools', 'pkgver': '5.2.1-2.5ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'libgif-dev', 'pkgver': '5.2.1-2.5ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'libgif7', 'pkgver': '5.2.1-2.5ubuntu0.1'}
];

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_WARNING,
    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, 'giflib-tools / libgif-dev / libgif7');
}