Debian dla-4352 : python-authlib-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-4352. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(271941);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/29");

  script_cve_id(
    "CVE-2024-37568",
    "CVE-2025-59420",
    "CVE-2025-61920",
    "CVE-2025-62706"
  );

  script_name(english:"Debian dla-4352 : python-authlib-doc - 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-4352 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4352-1                [email protected]
    https://www.debian.org/lts/security/                       Daniel Leidert
    October 29, 2025                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : python-authlib
    Version        : 0.15.4-1+deb11u1
    CVE ID         : CVE-2024-37568 CVE-2025-59420 CVE-2025-61920 CVE-2025-62706


    Multiple vulnerabilities have been found in python-authlib, a Python
    library for OAuth and OpenID Connect servers.

    CVE-2024-37568

        Unless an algorithm is specified in a jwt.decode call, HMAC verification
        is allowed with any asymmetric public key.

    CVE-2025-59420

        Authlibs JWS verification accepts tokens that declare unknown critical
        header parameters (crit), violating RFC 7515 mustunderstand semantics.
        An attacker can craft a signed token with a critical header that strict
        verifiers reject but Authlib accepts. In mixedlanguage fleets, this
        enables splitbrain verification and can lead to policy bypass, replay,
        or privilege escalation.

    CVE-2025-61920

        Authlibs JOSE implementation accepts unbounded JWS/JWT header and
        signature segments which can lead to a DoS during verification.

    CVE-2025-62706

        Authlibs JWE zip=DEF path performs unbounded DEFLATE decompression
        which can lead to a DoS.


    For Debian 11 bullseye, these problems have been fixed in version
    0.15.4-1+deb11u1.

    We recommend that you upgrade your python-authlib packages.

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

    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: This is a digitally signed message part

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-authlib
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1ee877aa");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-37568");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-59420");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-61920");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-62706");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/python-authlib");
  script_set_attribute(attribute:"solution", value:
"Upgrade the python-authlib-doc packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/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:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-37568");

  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:"2024/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-authlib-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-authlib");
  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': 'python-authlib-doc', 'reference': '0.15.4-1+deb11u1'},
    {'release': '11.0', 'prefix': 'python3-authlib', 'reference': '0.15.4-1+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, 'python-authlib-doc / python3-authlib');
}