Debian dsa-6056 : keystone - 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-6056. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(275376);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/13");

  script_name(english:"Debian dsa-6056 : keystone - 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 12 / 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6056
advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6056-1                   [email protected]
    https://www.debian.org/security/                       Moritz Muehlenhoff
    November 13, 2025                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : keystone
    CVE ID         : not yet available

    A vulnerability was discovered in the ec2tokens and s3tokens APIs of
    Keystone, the OpenStack identity service, which may result in
    authorisation bypass or privilege escalation if /v3/ec2tokens or
    /v3/s3tokens are reachable by unauthenticated clients.

    The Swift object storage service also requires an update to work with
    the updated Keystone: The update to Swift is provided as 2.30.1-0+deb12u1
    for bookworm and 2.35.1-0+deb13u1 for trixie and is backwards-compatible
    with older Keystone versions. As such, it is recommended to first upgrade
    Swift before deploying the Keystone update.

    For the oldstable distribution (bookworm), this problem has been fixed
    in version 2:22.0.2-0+deb12u1.

    For the stable distribution (trixie), this problem has been fixed in
    version 2:27.0.0-3+deb13u1.

    We recommend that you upgrade your keystone packages.

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

    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 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/keystone");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/keystone");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/keystone");
  script_set_attribute(attribute:"solution", value:
"Upgrade the keystone packages.");
  script_set_attribute(attribute:"risk_factor", value:"High");

  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:"2025/11/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:keystone");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:keystone-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-keystone");
  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) 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:"^(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': 'keystone', 'reference': '2:22.0.2-0+deb12u1'},
    {'release': '12.0', 'prefix': 'keystone-doc', 'reference': '2:22.0.2-0+deb12u1'},
    {'release': '12.0', 'prefix': 'python3-keystone', 'reference': '2:22.0.2-0+deb12u1'},
    {'release': '13.0', 'prefix': 'keystone', 'reference': '2:27.0.0-3+deb13u1'},
    {'release': '13.0', 'prefix': 'keystone-doc', 'reference': '2:27.0.0-3+deb13u1'},
    {'release': '13.0', 'prefix': 'python3-keystone', 'reference': '2:27.0.0-3+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_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, 'keystone / keystone-doc / python3-keystone');
}