Debian dla-4452 : apache2 - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4452. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(296510);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/24");

  script_cve_id(
    "CVE-2025-55753",
    "CVE-2025-58098",
    "CVE-2025-59775",
    "CVE-2025-65082",
    "CVE-2025-66200"
  );
  script_xref(name:"IAVA", value:"2025-A-0889");

  script_name(english:"Debian dla-4452 : apache2 - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4452 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4452-1                [email protected]
    https://www.debian.org/lts/security/                   Bastien Roucaris
    January 24, 2026                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : apache2
    Version        : 2.4.66-1~deb11u1
    CVE ID         : CVE-2025-55753 CVE-2025-58098 CVE-2025-59775 CVE-2025-65082
                     CVE-2025-66200
    Debian Bug     : 1121926

    Multiple vulnerabilities were fixed for apache httpd a popular webserver.

    CVE-2025-55753

        An integer overflow was found in the case of failed ACME certificate
        renewal leads, after a number of failures (~30 days in default configurations),
        to the backoff timer becoming 0. Attempts to renew the certificate
        then are repeated without delays until it succeeds

    CVE-2025-58098

        Apache with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi)
        passes the shell-escaped query string to #exec cmd=... directives.

    CVE-2025-59775

        A Server-Side Request Forgery (SSRF) vulnerability was found
        in Apache HTTP Server on Windows with AllowEncodedSlashes On
        and MergeSlashes Off  allows to potentially leak NTLM hashes to
        a malicious server via SSRF

    CVE-2025-65082

        An Improper Neutralization of Escape, Meta, or Control Sequences
        vulnerability was found in Apache HTTP Server through environment
        variables set via the Apache configuration unexpectedly superseding
        variables calculated by the server for CGI programs.

    CVE-2025-66200

        An mod_userdir+suexec bypass, via AllowOverride FileInfo
        vulnerability was found in Apache HTTP Server.
        Users with access to use the RequestHeader directive
        in htaccess can cause some CGI scripts to run under an unexpected userid.

    For Debian 11 bullseye, these problems have been fixed in version
    2.4.66-1~deb11u1.

    We recommend that you upgrade your apache2 packages.

    For the detailed security status of apache2 please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/apache2

    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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://security-tracker.debian.org/tracker/source-package/apache2");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-55753");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-58098");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-59775");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-65082");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-66200");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/apache2");
  script_set_attribute(attribute:"solution", value:
"Upgrade the apache2 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/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:H/I:H/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-2025-58098");

  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:"2025/12/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-ssl-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-suexec-custom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-suexec-pristine");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libapache2-mod-md");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libapache2-mod-proxy-uwsgi");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  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:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/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);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '11.0', 'prefix': 'apache2', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-bin', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-data', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-dev', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-doc', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-ssl-dev', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-suexec-custom', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-suexec-pristine', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'apache2-utils', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libapache2-mod-md', 'reference': '2.4.66-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libapache2-mod-proxy-uwsgi', 'reference': '2.4.66-1~deb11u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'apache2 / apache2-bin / apache2-data / apache2-dev / apache2-doc / etc');
}