Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 : LibHTP vulnerabilities (USN-7814-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7814-1. 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(269999);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/10");

  script_cve_id(
    "CVE-2024-23837",
    "CVE-2024-28871",
    "CVE-2024-45797",
    "CVE-2025-53537"
  );
  script_xref(name:"USN", value:"7814-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 : LibHTP vulnerabilities (USN-7814-1)");

  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 / 24.04 LTS / 25.04 host has packages installed that are
affected by multiple vulnerabilities as referenced in the USN-7814-1 advisory.

    It was discovered that LibHTP did not correctly handle certain HTTP headers. A remote attacker could
    possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu
    18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)

    It was discovered that LibHTP did not correctly parse certain HTTP requests. A remote attacker could
    possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu
    22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)

    It was discovered that LibHTP did not correctly parse certain HTTP requests. A remote attacker could
    possibly use this issue to cause a denial of service. (CVE-2024-45797)

    It was discovered that LibHTP did not correctly handle certain memory operations. A remote attacker could
    possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu
    22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.04. (CVE-2025-53537)

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-7814-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libhtp-dev, libhtp1 and / or libhtp2 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-2024-23837");

  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:"2024/02/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/10");

  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:24.04:-:lts");
  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:libhtp-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libhtp1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libhtp2");
  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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '25.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04 / 24.04 / 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': '16.04', 'pkgname': 'libhtp-dev', 'pkgver': '0.5.15-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-45797']},
    {'osver': '16.04', 'pkgname': 'libhtp1', 'pkgver': '0.5.15-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-45797']},
    {'osver': '18.04', 'pkgname': 'libhtp-dev', 'pkgver': '1:0.5.26-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-45797']},
    {'osver': '18.04', 'pkgname': 'libhtp2', 'pkgver': '1:0.5.26-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-45797']},
    {'osver': '20.04', 'pkgname': 'libhtp-dev', 'pkgver': '1:0.5.32-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-28871', 'CVE-2024-45797', 'CVE-2025-53537']},
    {'osver': '20.04', 'pkgname': 'libhtp2', 'pkgver': '1:0.5.32-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-28871', 'CVE-2024-45797', 'CVE-2025-53537']},
    {'osver': '22.04', 'pkgname': 'libhtp-dev', 'pkgver': '1:0.5.39-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-28871', 'CVE-2024-45797', 'CVE-2025-53537']},
    {'osver': '22.04', 'pkgname': 'libhtp2', 'pkgver': '1:0.5.39-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-23837', 'CVE-2024-28871', 'CVE-2024-45797', 'CVE-2025-53537']},
    {'osver': '24.04', 'pkgname': 'libhtp-dev', 'pkgver': '1:0.5.46-1ubuntu2+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-28871', 'CVE-2024-45797', 'CVE-2025-53537']},
    {'osver': '24.04', 'pkgname': 'libhtp2', 'pkgver': '1:0.5.46-1ubuntu2+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2024-28871', 'CVE-2024-45797', 'CVE-2025-53537']},
    {'osver': '25.04', 'pkgname': 'libhtp-dev', 'pkgver': '1:0.5.49-1ubuntu0.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2024-45797', 'CVE-2025-53537']},
    {'osver': '25.04', 'pkgname': 'libhtp2', 'pkgver': '1:0.5.49-1ubuntu0.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2024-45797', 'CVE-2025-53537']}
];

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, 'libhtp-dev / libhtp1 / libhtp2');
}