Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : fontTools vulnerabilities (USN-7917-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7917-1. 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(278076);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/10");

  script_cve_id("CVE-2023-45139", "CVE-2025-66034");
  script_xref(name:"USN", value:"7917-1");

  script_name(english:"Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : fontTools vulnerabilities (USN-7917-1)");

  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 22.04 LTS / 24.04 LTS / 25.04 / 25.10 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-7917-1 advisory.

    It was discovered that the subsetting module of fontTools was vulnerable to an XML External Entity (XEE)
    attack. An unauthenticated remote attacker could possibly use this issue to include arbitrary files from
    the file system or make web requests from the host system. This issue only

    affected Ubuntu 22.04 LTS. (CVE-2023-45139)

    It was discovered that fontTools was vulnerable to path traversal attacks. If a user or automated system
    were tricked into extracting a specially crafted .designspace file, an attacker could possibly use this
    issue to write arbitrary files outside the target directory, resulting in remote code execution. This
    issue only affected Ubuntu 24.04 LTS, Ubuntu 25.04 and Ubuntu 25.10. (CVE-2025-66034)

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-7917-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected fonttools and / or python3-fonttools 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-2025-66034");

  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:"2024/01/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:25.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:fonttools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-fonttools");
  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 (! ('22.04' >< os_release || '24.04' >< os_release || '25.04' >< os_release || '25.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 24.04 / 25.04 / 25.10', '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': '22.04', 'pkgname': 'fonttools', 'pkgver': '4.29.1-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-45139']},
    {'osver': '22.04', 'pkgname': 'python3-fonttools', 'pkgver': '4.29.1-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-45139']},
    {'osver': '24.04', 'pkgname': 'fonttools', 'pkgver': '4.46.0-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-45139', 'CVE-2025-66034']},
    {'osver': '24.04', 'pkgname': 'python3-fonttools', 'pkgver': '4.46.0-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-45139', 'CVE-2025-66034']},
    {'osver': '25.04', 'pkgname': 'fonttools', 'pkgver': '4.55.3-2ubuntu0.25.04.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2023-45139', 'CVE-2025-66034']},
    {'osver': '25.04', 'pkgname': 'python3-fonttools', 'pkgver': '4.55.3-2ubuntu0.25.04.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2023-45139', 'CVE-2025-66034']},
    {'osver': '25.10', 'pkgname': 'fonttools', 'pkgver': '4.55.3-2ubuntu0.25.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2023-45139', 'CVE-2025-66034']},
    {'osver': '25.10', 'pkgname': 'python3-fonttools', 'pkgver': '4.55.3-2ubuntu0.25.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2023-45139', 'CVE-2025-66034']}
];

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_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, 'fonttools / python3-fonttools');
}