Ubuntu 18.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : CImg library vulnerabilities (USN-7437-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7437-1. 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(234347);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/04/15");

  script_cve_id("CVE-2022-1325", "CVE-2024-26540");
  script_xref(name:"USN", value:"7437-1");

  script_name(english:"Ubuntu 18.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : CImg library vulnerabilities (USN-7437-1)");

  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 18.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-7437-1 advisory.

    It was discovered that the CImg library did not properly check the size of images before loading them. An
    attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04
    LTS. (CVE-2022-1325)

    It was discovered that the CImg library did not correctly handle certain memory operations, which could
    lead to a buffer overflow. An attacker could possibly use this issue to execute arbitrary code or cause a
    denial of service. (CVE-2024-26540)

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-7437-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected cimg-dev and / or cimg-examples packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:N/UI:R/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-2022-1325");

  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:"2022/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/04/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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: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:24.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cimg-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cimg-examples");
  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) 2025 Canonical, Inc. / NASL script (C) 2025 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 || '22.04' >< os_release || '24.04' >< os_release || '24.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 22.04 / 24.04 / 24.10', '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 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': 'cimg-dev', 'pkgver': '1.7.9+dfsg-2ubuntu0.18.04.2+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-26540']},
    {'osver': '18.04', 'pkgname': 'cimg-examples', 'pkgver': '1.7.9+dfsg-2ubuntu0.18.04.2+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-26540']},
    {'osver': '22.04', 'pkgname': 'cimg-dev', 'pkgver': '2.9.4+dfsg-3ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2022-1325', 'CVE-2024-26540']},
    {'osver': '22.04', 'pkgname': 'cimg-examples', 'pkgver': '2.9.4+dfsg-3ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2022-1325', 'CVE-2024-26540']},
    {'osver': '24.04', 'pkgname': 'cimg-dev', 'pkgver': '3.2.1+dfsg-1ubuntu0.24.04.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-26540']},
    {'osver': '24.04', 'pkgname': 'cimg-examples', 'pkgver': '3.2.1+dfsg-1ubuntu0.24.04.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-26540']},
    {'osver': '24.10', 'pkgname': 'cimg-dev', 'pkgver': '3.2.1+dfsg-1ubuntu0.24.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2024-26540']},
    {'osver': '24.10', 'pkgname': 'cimg-examples', 'pkgver': '3.2.1+dfsg-1ubuntu0.24.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2024-26540']}
];

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'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) {
        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_WARNING,
    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, 'cimg-dev / cimg-examples');
}