Debian dsa-5888 : ghostscript - 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-5888. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(233372);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id(
    "CVE-2025-27830",
    "CVE-2025-27831",
    "CVE-2025-27832",
    "CVE-2025-27833",
    "CVE-2025-27834",
    "CVE-2025-27835",
    "CVE-2025-27836"
  );
  script_xref(name:"IAVB", value:"2025-B-0043-S");

  script_name(english:"Debian dsa-5888 : ghostscript - 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 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5888 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-5888-1                   [email protected]
    https://www.debian.org/security/                     Salvatore Bonaccorso
    March 26, 2025                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : ghostscript
    CVE ID         : CVE-2025-27830 CVE-2025-27831 CVE-2025-27832 CVE-2025-27833
                     CVE-2025-27834 CVE-2025-27835 CVE-2025-27836

    Multiple security issues were discovered in Ghostscript, the GPL
    PostScript/PDF interpreter, which could result in denial of service and
    potentially the execution of arbitrary code if malformed document files
    are processed.

    For the stable distribution (bookworm), these problems have been fixed in
    version 10.0.0~dfsg-11+deb12u7.

    We recommend that you upgrade your ghostscript packages.

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

    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/ghostscript");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27830");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27831");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27832");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27833");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27834");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27835");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-27836");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/ghostscript");
  script_set_attribute(attribute:"solution", value:
"Upgrade the ghostscript packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-27834");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2025-27836");

  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:"2025/03/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/03/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ghostscript");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ghostscript-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ghostscript-x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs10-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs9-common");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2025-2026 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]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0', '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': 'ghostscript', 'reference': '10.0.0~dfsg-11+deb12u7'},
    {'release': '12.0', 'prefix': 'ghostscript-doc', 'reference': '10.0.0~dfsg-11+deb12u7'},
    {'release': '12.0', 'prefix': 'ghostscript-x', 'reference': '10.0.0~dfsg-11+deb12u7'},
    {'release': '12.0', 'prefix': 'libgs-common', 'reference': '10.0.0~dfsg-11+deb12u7'},
    {'release': '12.0', 'prefix': 'libgs-dev', 'reference': '10.0.0~dfsg-11+deb12u7'},
    {'release': '12.0', 'prefix': 'libgs10', 'reference': '10.0.0~dfsg-11+deb12u7'},
    {'release': '12.0', 'prefix': 'libgs10-common', 'reference': '10.0.0~dfsg-11+deb12u7'},
    {'release': '12.0', 'prefix': 'libgs9-common', 'reference': '10.0.0~dfsg-11+deb12u7'}
];

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, 'ghostscript / ghostscript-doc / ghostscript-x / libgs-common / etc');
}