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nessusThis script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.DEBIAN_DLA-3582.NASL
HistorySep 25, 2023 - 12:00 a.m.

Debian DLA-3582-1 : ghostscript - LTS security update

2023-09-2500:00:00
This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
12
debian 10
vulnerabilities
artifex ghostscript 9.50
remote attackers
denial of service
crafted pdf
lts security update.

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

40.7%

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3582 advisory.

  • A divide by zero issue discovered in eps_print_page in gdevepsn.c in Artifex Software GhostScript 9.50 allows remote attackers to cause a denial of service via opening of crafted PDF file. (CVE-2020-21710)

  • Buffer Overflow vulnerability in clj_media_size function in devices/gdevclj.c in Artifex Ghostscript 9.50 allows remote attackers to cause a denial of service or other unspecified impact(s) via opening of crafted PDF document. (CVE-2020-21890)

Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3582. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(181846);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/15");

  script_cve_id("CVE-2020-21710", "CVE-2020-21890");
  script_xref(name:"IAVB", value:"2023-B-0070-S");

  script_name(english:"Debian DLA-3582-1 : ghostscript - LTS 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 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-3582 advisory.

  - A divide by zero issue discovered in eps_print_page in gdevepsn.c in Artifex Software GhostScript 9.50
    allows remote attackers to cause a denial of service via opening of crafted PDF file. (CVE-2020-21710)

  - Buffer Overflow vulnerability in clj_media_size function in devices/gdevclj.c in Artifex Ghostscript 9.50
    allows remote attackers to cause a denial of service or other unspecified impact(s) via opening of crafted
    PDF document. (CVE-2020-21890)

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://www.debian.org/lts/security/2023/dla-3582");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-21710");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-21890");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/ghostscript");
  script_set_attribute(attribute:"solution", value:
"Upgrade the ghostscript packages.

For Debian 10 buster, these problems have been fixed in version 9.27~dfsg-2+deb10u9.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/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:L/AC:L/PR:N/UI:R/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-2020-21890");

  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:"2023/08/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/09/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/25");

  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-dbg");
  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-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs9");
  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:10.0");
  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) 2023 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:"^(10)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 10.0', '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': '10.0', 'prefix': 'ghostscript', 'reference': '9.27~dfsg-2+deb10u9'},
    {'release': '10.0', 'prefix': 'ghostscript-dbg', 'reference': '9.27~dfsg-2+deb10u9'},
    {'release': '10.0', 'prefix': 'ghostscript-doc', 'reference': '9.27~dfsg-2+deb10u9'},
    {'release': '10.0', 'prefix': 'ghostscript-x', 'reference': '9.27~dfsg-2+deb10u9'},
    {'release': '10.0', 'prefix': 'libgs-dev', 'reference': '9.27~dfsg-2+deb10u9'},
    {'release': '10.0', 'prefix': 'libgs9', 'reference': '9.27~dfsg-2+deb10u9'},
    {'release': '10.0', 'prefix': 'libgs9-common', 'reference': '9.27~dfsg-2+deb10u9'}
];

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, 'ghostscript / ghostscript-dbg / ghostscript-doc / ghostscript-x / etc');
}
VendorProductVersionCPE
debiandebian_linuxghostscriptp-cpe:/a:debian:debian_linux:ghostscript
debiandebian_linuxghostscript-dbgp-cpe:/a:debian:debian_linux:ghostscript-dbg
debiandebian_linuxghostscript-docp-cpe:/a:debian:debian_linux:ghostscript-doc
debiandebian_linuxghostscript-xp-cpe:/a:debian:debian_linux:ghostscript-x
debiandebian_linuxlibgs-devp-cpe:/a:debian:debian_linux:libgs-dev
debiandebian_linuxlibgs9p-cpe:/a:debian:debian_linux:libgs9
debiandebian_linuxlibgs9-commonp-cpe:/a:debian:debian_linux:libgs9-common
debiandebian_linux10.0cpe:/o:debian:debian_linux:10.0

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

40.7%