Debian dla-4306 : libpam-cracklib - 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-4306. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(265684);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/21");

  script_cve_id("CVE-2024-22365", "CVE-2025-6020");

  script_name(english:"Debian dla-4306 : libpam-cracklib - 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-4306 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4306-1                [email protected]
    https://www.debian.org/lts/security/                   Bastien Roucaris
    September 21, 2025                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : pam
    Version        : 1.4.0-9+deb11u2
    CVE ID         : CVE-2024-22365 CVE-2025-6020
    Debian Bug     : 1061097 1107919

    Multiple vulnerabilities were found in PAM namespace module
    used to configure private namespaces for user sessions.

    CVE-2024-22365

        An attackers can cause a denial of service
        (blocked login process) via mkfifo because the
        openat call (for protect_dir) lacks O_DIRECTORY.

    CVE-2025-6020

        pam_namespace may use access user-controlled paths
        without proper protection, allowing local users to elevate
        their privileges to root via multiple symlink attacks
        and race conditions.

    For Debian 11 bullseye, these problems have been fixed in version
    1.4.0-9+deb11u2.

    We recommend that you upgrade your pam packages.

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

    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/pam");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-22365");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-6020");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/pam");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libpam-cracklib packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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:L/AC:L/PR:L/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-2024-22365");

  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:"2023/06/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam-cracklib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam-modules-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam-runtime");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam0g");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam0g-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 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': 'libpam-cracklib', 'reference': '1.4.0-9+deb11u2'},
    {'release': '11.0', 'prefix': 'libpam-doc', 'reference': '1.4.0-9+deb11u2'},
    {'release': '11.0', 'prefix': 'libpam-modules', 'reference': '1.4.0-9+deb11u2'},
    {'release': '11.0', 'prefix': 'libpam-modules-bin', 'reference': '1.4.0-9+deb11u2'},
    {'release': '11.0', 'prefix': 'libpam-runtime', 'reference': '1.4.0-9+deb11u2'},
    {'release': '11.0', 'prefix': 'libpam0g', 'reference': '1.4.0-9+deb11u2'},
    {'release': '11.0', 'prefix': 'libpam0g-dev', 'reference': '1.4.0-9+deb11u2'}
];

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_WARNING,
    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, 'libpam-cracklib / libpam-doc / libpam-modules / libpam-modules-bin / etc');
}