Debian dsa-6102 : python3-urllib3 - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-6102. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(291292);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/17");

  script_cve_id("CVE-2025-50181", "CVE-2025-66418", "CVE-2026-21441");

  script_name(english:"Debian dsa-6102 : python3-urllib3 - 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 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the
dsa-6102 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6102-1                   [email protected]
    https://www.debian.org/security/                     Salvatore Bonaccorso
    January 17, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : python-urllib3
    CVE ID         : CVE-2025-50181 CVE-2025-66418 CVE-2026-21441
    Debian Bug     : 1108076 1122030 1125062

    Several vulnerabilities were discovered in python-urllib3, a HTTP
    library with thread-safe connection pooling for Python3, which could
    result in denial of service or request forgery.

    For the oldstable distribution (bookworm), these problems have been fixed
    in version 1.26.12-1+deb12u2.

    For the stable distribution (trixie), these problems have been fixed in
    version 2.3.0-3+deb13u1.

    We recommend that you upgrade your python-urllib3 packages.

    For the detailed security status of python-urllib3 please refer to its
    security tracker page at:
    https://security-tracker.debian.org/tracker/python-urllib3

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

    Mailing list: [email protected]

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.");
  # https://security-tracker.debian.org/tracker/source-package/python-urllib3
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?eb907009");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-50181");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-66418");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-21441");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/python-urllib3");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/python-urllib3");
  script_set_attribute(attribute:"solution", value:
"Upgrade the python3-urllib3 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  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:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-50181");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-21441");

  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:"2025/06/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-urllib3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  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) 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:"^(12)\.[0-9]+|^(13)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0 / 13.0', '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': '12.0', 'prefix': 'python3-urllib3', 'reference': '1.26.12-1+deb12u2'},
    {'release': '13.0', 'prefix': 'python3-urllib3', 'reference': '2.3.0-3+deb13u1'}
];

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, 'python3-urllib3');
}