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nessusUbuntu Security Notice (C) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-6297-1.NASL
HistoryAug 17, 2023 - 12:00 a.m.

Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 : Ghostscript vulnerability (USN-6297-1)

2023-08-1700:00:00
Ubuntu Security Notice (C) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
10
ubuntu
ghostscript
vulnerability
buffer overflow
denial of service
pdf
nessus
patch

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.8

Confidence

High

EPSS

0.001

Percentile

31.8%

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by a vulnerability as referenced in the USN-6297-1 advisory.

  • A buffer overflow flaw was found in base/gdevdevn.c:1973 in devn_pcx_write_rle() in ghostscript. This issue may allow a local attacker to cause a denial of service via outputting a crafted PDF file for a DEVN device with gs. (CVE-2023-38559)

Note that Nessus has not tested for this issue 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 Ubuntu Security Notice USN-6297-1. 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(179940);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/15");

  script_cve_id("CVE-2023-38559");
  script_xref(name:"USN", value:"6297-1");
  script_xref(name:"IAVB", value:"2023-B-0070-S");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 : Ghostscript vulnerability (USN-6297-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by
a vulnerability as referenced in the USN-6297-1 advisory.

  - A buffer overflow flaw was found in base/gdevdevn.c:1973 in devn_pcx_write_rle() in ghostscript. This
    issue may allow a local attacker to cause a denial of service via outputting a crafted PDF file for a DEVN
    device with gs. (CVE-2023-38559)

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://ubuntu.com/security/notices/USN-6297-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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-2023-38559");

  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:"2023/08/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/08/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  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:23.04");
  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) 2023 Canonical, Inc. / NASL script (C) 2023 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04 / 23.04', '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': '16.04', 'pkgname': 'ghostscript', 'pkgver': '9.26~dfsg+0-0ubuntu0.16.04.14+esm6'},
    {'osver': '16.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.26~dfsg+0-0ubuntu0.16.04.14+esm6'},
    {'osver': '16.04', 'pkgname': 'libgs-dev', 'pkgver': '9.26~dfsg+0-0ubuntu0.16.04.14+esm6'},
    {'osver': '16.04', 'pkgname': 'libgs9', 'pkgver': '9.26~dfsg+0-0ubuntu0.16.04.14+esm6'},
    {'osver': '16.04', 'pkgname': 'libgs9-common', 'pkgver': '9.26~dfsg+0-0ubuntu0.16.04.14+esm6'},
    {'osver': '18.04', 'pkgname': 'ghostscript', 'pkgver': '9.26~dfsg+0-0ubuntu0.18.04.18+esm1'},
    {'osver': '18.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.26~dfsg+0-0ubuntu0.18.04.18+esm1'},
    {'osver': '18.04', 'pkgname': 'libgs-dev', 'pkgver': '9.26~dfsg+0-0ubuntu0.18.04.18+esm1'},
    {'osver': '18.04', 'pkgname': 'libgs9', 'pkgver': '9.26~dfsg+0-0ubuntu0.18.04.18+esm1'},
    {'osver': '18.04', 'pkgname': 'libgs9-common', 'pkgver': '9.26~dfsg+0-0ubuntu0.18.04.18+esm1'},
    {'osver': '20.04', 'pkgname': 'ghostscript', 'pkgver': '9.50~dfsg-5ubuntu4.9'},
    {'osver': '20.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.50~dfsg-5ubuntu4.9'},
    {'osver': '20.04', 'pkgname': 'libgs-dev', 'pkgver': '9.50~dfsg-5ubuntu4.9'},
    {'osver': '20.04', 'pkgname': 'libgs9', 'pkgver': '9.50~dfsg-5ubuntu4.9'},
    {'osver': '20.04', 'pkgname': 'libgs9-common', 'pkgver': '9.50~dfsg-5ubuntu4.9'},
    {'osver': '22.04', 'pkgname': 'ghostscript', 'pkgver': '9.55.0~dfsg1-0ubuntu5.4'},
    {'osver': '22.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.55.0~dfsg1-0ubuntu5.4'},
    {'osver': '22.04', 'pkgname': 'libgs-dev', 'pkgver': '9.55.0~dfsg1-0ubuntu5.4'},
    {'osver': '22.04', 'pkgname': 'libgs9', 'pkgver': '9.55.0~dfsg1-0ubuntu5.4'},
    {'osver': '22.04', 'pkgname': 'libgs9-common', 'pkgver': '9.55.0~dfsg1-0ubuntu5.4'},
    {'osver': '23.04', 'pkgname': 'ghostscript', 'pkgver': '10.0.0~dfsg1-0ubuntu1.3'},
    {'osver': '23.04', 'pkgname': 'ghostscript-x', 'pkgver': '10.0.0~dfsg1-0ubuntu1.3'},
    {'osver': '23.04', 'pkgname': 'libgs-common', 'pkgver': '10.0.0~dfsg1-0ubuntu1.3'},
    {'osver': '23.04', 'pkgname': 'libgs-dev', 'pkgver': '10.0.0~dfsg1-0ubuntu1.3'},
    {'osver': '23.04', 'pkgname': 'libgs10', 'pkgver': '10.0.0~dfsg1-0ubuntu1.3'},
    {'osver': '23.04', 'pkgname': 'libgs10-common', 'pkgver': '10.0.0~dfsg1-0ubuntu1.3'},
    {'osver': '23.04', 'pkgname': 'libgs9-common', 'pkgver': '10.0.0~dfsg1-0ubuntu1.3'}
];

var flag = 0;
foreach 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 (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  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');
}

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.8

Confidence

High

EPSS

0.001

Percentile

31.8%