Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Apache HTTP Server vulnerabilities (USN-8898-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8898-1. 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(365379);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/13");

  script_cve_id("CVE-2026-56154", "CVE-2026-57941", "CVE-2026-59797");
  script_xref(name:"IAVA", value:"2026-A-1087");
  script_xref(name:"USN", value:"8898-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Apache HTTP Server vulnerabilities (USN-8898-1)");

  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 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages
installed that are affected by multiple vulnerabilities as referenced in the USN-8898-1 advisory.

    It was discovered that Apache HTTP Server's mod_rewrite module incorrectly handled memory when performing
    certain variable lookups. A remote attacker could possibly use this issue to cause a denial of service or
    execute arbitrary code. (CVE-2026-56154)

    Lucian Nitescu, Simon Kappel, and Gianluca Danesin discovered that Apache HTTP Server's mod_http2 module
    incorrectly handled memory when processing certain HTTP/2 connections. A remote attacker could possibly
    use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu
    18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-57941)

    Juthawong Naisanguansee, Charles Vosburgh, Mike Read, and Ryoma Nishioka discovered that Apache HTTP
    Server's mod_ssl module incorrectly handled certain expressions. An attacker could possibly use this issue
    to bypass intended access restrictions. (CVE-2026-59797)

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-8898-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected 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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-59797");

  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:"2026/10/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  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:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-event");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-itk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-prefork");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-worker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec-custom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec-pristine");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2.2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-macro");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-md");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-proxy-html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-proxy-uwsgi");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.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 (! ('14.04' >< os_release || '16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04 / 20.04 / 22.04 / 24.04 / 26.04', '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 pkgs = [
    {'osver': '14.04', 'pkgname': 'apache2', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-event', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-itk', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-prefork', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-worker', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-suexec', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'apache2.2-bin', 'pkgver': '2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'libapache2-mod-macro', 'pkgver': '1:2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '14.04', 'pkgname': 'libapache2-mod-proxy-html', 'pkgver': '1:2.4.7-1ubuntu4.22+esm16', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '16.04', 'pkgname': 'apache2', 'pkgver': '2.4.18-2ubuntu3.17+esm21', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '16.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.18-2ubuntu3.17+esm21', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '16.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.18-2ubuntu3.17+esm21', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '16.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.18-2ubuntu3.17+esm21', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '16.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.18-2ubuntu3.17+esm21', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '16.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.18-2ubuntu3.17+esm21', 'cves': ['CVE-2026-56154', 'CVE-2026-59797']},
    {'osver': '18.04', 'pkgname': 'apache2', 'pkgver': '2.4.29-1ubuntu4.27+esm12', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '18.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.29-1ubuntu4.27+esm12', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '18.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.29-1ubuntu4.27+esm12', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '18.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.29-1ubuntu4.27+esm12', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '18.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.29-1ubuntu4.27+esm12', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '18.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.29-1ubuntu4.27+esm12', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'apache2', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '20.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.41-4ubuntu3.23+esm8', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'apache2', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '22.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.52-1ubuntu4.24', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'apache2', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '24.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.58-1ubuntu8.16', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '26.04', 'pkgname': 'apache2', 'pkgver': '2.4.66-2ubuntu2.5', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '26.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.66-2ubuntu2.5', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '26.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.66-2ubuntu2.5', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '26.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.66-2ubuntu2.5', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '26.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.66-2ubuntu2.5', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']},
    {'osver': '26.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.66-2ubuntu2.5', 'cves': ['CVE-2026-56154', 'CVE-2026-57941', 'CVE-2026-59797']}
];

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'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  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, 'apache2 / apache2-bin / apache2-data / apache2-mpm-event / etc');
}