Debian dla-4181 : glibc-doc - 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-4181. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(237337);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id("CVE-2025-4802");
  script_xref(name:"IAVA", value:"2025-A-0062-S");

  script_name(english:"Debian dla-4181 : glibc-doc - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4181
advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4181-1                [email protected]
    https://www.debian.org/lts/security/                         Sean Whitton
    May 27, 2025                                  https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : glibc
    Version        : 2.31-13+deb11u13
    CVE ID         : CVE-2025-4802

    A flaw was discovered in the dynamic linking support in the GNU C
    Library, the C standard library implementation used by Debian.

    Privilege escalation may be possible in statically compiled setuid
    binaries that call dlopen(), due to an untrusted LD_LIBRARY_PATH
    environment variable vulnerability.  This includes calls to dlopen()
    internal to glibc itself, made after user calls to setlocale() or to NSS
    functions such as getaddrinfo().

    For Debian 11 bullseye, this problem has been fixed in version
    2.31-13+deb11u13.

    We recommend that you upgrade your glibc packages.

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

    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
    Attachment:
    signature.asc
    Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue 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/glibc");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-4802");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/glibc");
  script_set_attribute(attribute:"solution", value:
"Upgrade the glibc-doc 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:L/AC:L/PR:N/UI:R/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-2025-4802");

  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:"2025/01/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:glibc-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:glibc-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc-dev-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc-devtools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc-l10n");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-dev-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-dev-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-dev-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libc6-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:locales");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:locales-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nscd");
  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) 2025-2026 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': 'glibc-doc', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'glibc-source', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc-bin', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc-dev-bin', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc-devtools', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc-l10n', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-amd64', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-dbg', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-dev', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-dev-amd64', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-dev-i386', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-dev-x32', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-i386', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-udeb', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-x32', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'libc6-xen', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'locales', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'locales-all', 'reference': '2.31-13+deb11u13'},
    {'release': '11.0', 'prefix': 'nscd', 'reference': '2.31-13+deb11u13'}
];

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, 'glibc-doc / glibc-source / libc-bin / libc-dev-bin / libc-devtools / etc');
}