Debian dsa-6331 : 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-6331. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(319887);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/08");

  script_cve_id(
    "CVE-2026-33551",
    "CVE-2026-40683",
    "CVE-2026-42998",
    "CVE-2026-42999",
    "CVE-2026-43000",
    "CVE-2026-43001",
    "CVE-2026-44394"
  );

  script_name(english:"Debian dsa-6331 : keystone - 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 packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-6331 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6331-1                   [email protected]
    https://www.debian.org/security/                       Moritz Muehlenhoff
    June 08, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : keystone
    CVE ID         : CVE-2026-42998 CVE-2026-42999 CVE-2026-43000
                     CVE-2026-43001 CVE-2026-44394

    Multiple vulnerabilities were discovered in Keystone, the OpenStack
    identity service, which may result in authorisation bypass, privilege
    escalation, user impersonation or incomplete termination of access
    privileges.

    For the oldstable distribution (bookworm), these problems have been fixed
    in version 2:22.0.2-0+deb12u3. This update also include two fixes
    already uploaded to be included in the final Bookworm point release
    (CVE-2026-40683, CVE-2026-33551).

    For the stable distribution (trixie), these problems have been fixed in
    version 2:27.0.0-3+deb13u4. This update also include two fixes
    already uploaded to be included in the next Trixie point release
    (CVE-2026-40683, CVE-2026-33551).

    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 these issues 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://security-tracker.debian.org/tracker/CVE-2026-33551");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-40683");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-42998");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-42999");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-43000");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-43001");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-44394");
  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_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-43000");

  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:"2026/04/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/08");

  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) 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': 'keystone', 'reference': '2:22.0.2-0+deb12u3'},
    {'release': '12.0', 'prefix': 'keystone-doc', 'reference': '2:22.0.2-0+deb12u3'},
    {'release': '12.0', 'prefix': 'python3-keystone', 'reference': '2:22.0.2-0+deb12u3'},
    {'release': '13.0', 'prefix': 'keystone', 'reference': '2:27.0.0-3+deb13u4'},
    {'release': '13.0', 'prefix': 'keystone-doc', 'reference': '2:27.0.0-3+deb13u4'},
    {'release': '13.0', 'prefix': 'python3-keystone', 'reference': '2:27.0.0-3+deb13u4'}
];

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');
}