Debian dla-4161 : simplesamlphp - 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-4161. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(235669);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/05/09");

  script_cve_id("CVE-2025-27773");

  script_name(english:"Debian dla-4161 : simplesamlphp - 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 a package installed that is affected by a vulnerability as referenced in the dla-4161
advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4161-1                [email protected]
    https://www.debian.org/lts/security/                         Tobias Frost
    May 09, 2025                                  https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : simplesamlphp
    Version        : 1.19.0-1+deb11u2
    CVE ID         : CVE-2025-27773
    Debian Bug     : 1100595

    A vulnerability has been discovered in SimpleSAMLphp, a framework for
    authentication, primarily via the SAML protocol.

    CVE-2025-27773

        The SimpleSAMLphp SAML2 library is a PHP library for SAML2
        related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20,
        there is a signature confusion attack in the HTTPRedirect binding.
        An attacker with any signed SAMLResponse via the HTTP-Redirect
        binding can cause the application to accept an unsigned message.
        Versions 4.17.0 and 5.0.0-alpha.20 contain a fix for the issue.

    For Debian 11 bullseye, this problem has been fixed in version
    1.19.0-1+deb11u2.

    We recommend that you upgrade your simplesamlphp packages.

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

    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.");
  # https://security-tracker.debian.org/tracker/source-package/simplesamlphp
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b2a51c10");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27773");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/simplesamlphp");
  script_set_attribute(attribute:"solution", value:
"Upgrade the simplesamlphp 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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-27773");

  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:"2025/03/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:simplesamlphp");
  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': 'simplesamlphp', 'reference': '1.19.0-1+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_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, 'simplesamlphp');
}