Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : Ghostscript vulnerabilities (USN-7378-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7378-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(233470);
  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:"USN", value:"7378-1");
  script_xref(name:"IAVB", value:"2025-B-0043-S");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : Ghostscript vulnerabilities (USN-7378-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-7378-1 advisory.

    It was discovered that Ghostscript incorrectly serialized DollarBlend in certain fonts. An attacker could
    use this issue to cause Ghostscript to crash, resulting in a denial of service, or possibly execute
    arbitrary code. (CVE-2025-27830)

    It was discovered that Ghostscript incorrectly handled the DOCXWRITE TXTWRITE device. An attacker could
    use this issue to cause Ghostscript to crash, resulting in a denial of service, or possibly execute
    arbitrary code. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 24.10.
    (CVE-2025-27831)

    It was discovered that Ghostscript incorrectly handled the NPDL device. An attacker could use this issue
    to cause Ghostscript to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2025-27832)

    It was discovered that Ghostscript incorrectly handled certain long TTF file names. An attacker could use
    this issue to cause Ghostscript to crash, resulting in a denial of service, or possibly execute arbitrary
    code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2025-27833)

    It was discovered that Ghostscript incorrectly handled oversized Type 4 functions in certain PDF
    documents. An attacker could use this issue to cause Ghostscript to crash, resulting in a denial of
    service, or possibly execute arbitrary code. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS,
    and Ubuntu 24.10. (CVE-2025-27834)

    It was discovered that Ghostscript incorrectly handled converting certain glyphs to Unicode. An attacker
    could use this issue to cause Ghostscript to crash, resulting in a denial of service, or possibly execute
    arbitrary code. (CVE-2025-27835)

    It was discovered that Ghostscript incorrectly handled the BJ10V device. An attacker could use this issue
    to cause Ghostscript to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2025-27836)

Tenable has extracted the preceding description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-7378-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:C");
  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:"2025/03/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ghostscript");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ghostscript-x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgs-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgs-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgs10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgs10-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgs9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgs9-common");
  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:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2025-2026 Canonical, Inc. / NASL script (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '24.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.04 / 24.10', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '20.04', 'pkgname': 'ghostscript', 'pkgver': '9.50~dfsg-5ubuntu4.15', 'cves': ['CVE-2025-27830', 'CVE-2025-27832', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '20.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.50~dfsg-5ubuntu4.15', 'cves': ['CVE-2025-27830', 'CVE-2025-27832', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '20.04', 'pkgname': 'libgs-dev', 'pkgver': '9.50~dfsg-5ubuntu4.15', 'cves': ['CVE-2025-27830', 'CVE-2025-27832', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '20.04', 'pkgname': 'libgs9', 'pkgver': '9.50~dfsg-5ubuntu4.15', 'cves': ['CVE-2025-27830', 'CVE-2025-27832', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '20.04', 'pkgname': 'libgs9-common', 'pkgver': '9.50~dfsg-5ubuntu4.15', 'cves': ['CVE-2025-27830', 'CVE-2025-27832', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '22.04', 'pkgname': 'ghostscript', 'pkgver': '9.55.0~dfsg1-0ubuntu5.11', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '22.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.55.0~dfsg1-0ubuntu5.11', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '22.04', 'pkgname': 'libgs-dev', 'pkgver': '9.55.0~dfsg1-0ubuntu5.11', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '22.04', 'pkgname': 'libgs9', 'pkgver': '9.55.0~dfsg1-0ubuntu5.11', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '22.04', 'pkgname': 'libgs9-common', 'pkgver': '9.55.0~dfsg1-0ubuntu5.11', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.04', 'pkgname': 'ghostscript', 'pkgver': '10.02.1~dfsg1-0ubuntu7.5', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.04', 'pkgname': 'libgs-common', 'pkgver': '10.02.1~dfsg1-0ubuntu7.5', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.04', 'pkgname': 'libgs-dev', 'pkgver': '10.02.1~dfsg1-0ubuntu7.5', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.04', 'pkgname': 'libgs10', 'pkgver': '10.02.1~dfsg1-0ubuntu7.5', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.04', 'pkgname': 'libgs10-common', 'pkgver': '10.02.1~dfsg1-0ubuntu7.5', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.10', 'pkgname': 'ghostscript', 'pkgver': '10.03.1~dfsg1-0ubuntu2.2', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.10', 'pkgname': 'libgs-common', 'pkgver': '10.03.1~dfsg1-0ubuntu2.2', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.10', 'pkgname': 'libgs-dev', 'pkgver': '10.03.1~dfsg1-0ubuntu2.2', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.10', 'pkgname': 'libgs10', 'pkgver': '10.03.1~dfsg1-0ubuntu2.2', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']},
    {'osver': '24.10', 'pkgname': 'libgs10-common', 'pkgver': '10.03.1~dfsg1-0ubuntu2.2', 'cves': ['CVE-2025-27830', 'CVE-2025-27831', 'CVE-2025-27832', 'CVE-2025-27833', 'CVE-2025-27834', 'CVE-2025-27835', 'CVE-2025-27836']}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ghostscript / ghostscript-x / libgs-common / libgs-dev / libgs10 / etc');
}