Ubuntu 22.04 LTS / 24.04 LTS / 24.10 / 25.04 : KaTeX vulnerabilities (USN-7572-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7572-1. 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(240201);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/19");

  script_cve_id(
    "CVE-2024-28243",
    "CVE-2024-28245",
    "CVE-2024-28246",
    "CVE-2025-23207"
  );
  script_xref(name:"USN", value:"7572-1");

  script_name(english:"Ubuntu 22.04 LTS / 24.04 LTS / 24.10 / 25.04 : KaTeX vulnerabilities (USN-7572-1)");

  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 / 24.10 / 25.04 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-7572-1 advisory.

    Juho Forsn discovered that KaTeX did not correctly handle certain inputs, which could lead to an
    infinite loop. If a user or application were tricked into opening a specially crafted file, an attacker
    could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS.
    (CVE-2024-28243)

    Tobias S. Fink discovered that KaTeX did not correctly block certain URL protocols. If a user or system
    were tricked into opening a specially crafted file, an attacker could possibly use this issue to execute
    arbitrary code. This issue only affected Ubuntu 22.04 LTS. (CVE-2024-28246)

    It was discovered that KaTeX did not correctly handle certain inputs. If a user or system were tricked
    into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary
    code. This issue only affected Ubuntu 22.04 LTS. (CVE-2024-28245)

    Sean Ng discovered that KaTeX did not correctly handle certain inputs. If a user or system were tricked
    into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary
    code. (CVE-2025-23207)

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-7572-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected fonts-katex, katex and / or libjs-katex packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-23207");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/03/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/06/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/19");

  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:24.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:fonts-katex");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:katex");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjs-katex");
  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 || '24.10' >< os_release || '25.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 24.04 / 24.10 / 25.04', '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 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': 'fonts-katex', 'pkgver': '0.13.11+~cs6.0.0-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-28243', 'CVE-2024-28245', 'CVE-2024-28246', 'CVE-2025-23207']},
    {'osver': '22.04', 'pkgname': 'katex', 'pkgver': '0.13.11+~cs6.0.0-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-28243', 'CVE-2024-28245', 'CVE-2024-28246', 'CVE-2025-23207']},
    {'osver': '22.04', 'pkgname': 'libjs-katex', 'pkgver': '0.13.11+~cs6.0.0-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-28243', 'CVE-2024-28245', 'CVE-2024-28246', 'CVE-2025-23207']},
    {'osver': '24.04', 'pkgname': 'fonts-katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2025-23207']},
    {'osver': '24.04', 'pkgname': 'katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2025-23207']},
    {'osver': '24.04', 'pkgname': 'libjs-katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2025-23207']},
    {'osver': '24.10', 'pkgname': 'fonts-katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.24.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2025-23207']},
    {'osver': '24.10', 'pkgname': 'katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.24.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2025-23207']},
    {'osver': '24.10', 'pkgname': 'libjs-katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.24.10.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2025-23207']},
    {'osver': '25.04', 'pkgname': 'fonts-katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.25.04.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2025-23207']},
    {'osver': '25.04', 'pkgname': 'katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.25.04.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2025-23207']},
    {'osver': '25.04', 'pkgname': 'libjs-katex', 'pkgver': '0.16.10+~cs6.1.0-2ubuntu0.25.04.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2025-23207']}
];

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, 'fonts-katex / katex / libjs-katex');
}