Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : Ghostscript vulnerabilities (USN-6897-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6897-1. 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(202378);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2024-29506",
    "CVE-2024-29507",
    "CVE-2024-29508",
    "CVE-2024-29509",
    "CVE-2024-29511"
  );
  script_xref(name:"IAVB", value:"2024-B-0074");
  script_xref(name:"USN", value:"6897-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : Ghostscript vulnerabilities (USN-6897-1)");

  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 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6897-1 advisory.

    It was discovered that Ghostscript incorrectly handled certain long PDF filter names. An attacker could
    possibly use this issue to cause Ghostscript to crash, resulting in a denial of service. This issue only
    affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-29506)

    It was discovered that Ghostscript incorrectly handled certain API parameters. An attacker could possibly
    use this issue to cause Ghostscript to crash, resulting in a denial of service. This issue only affected
    Ubuntu 24.04 LTS. (CVE-2024-29507)

    It was discovered that Ghostscript incorrectly handled certain BaseFont names. An attacker could use this
    issue to cause Ghostscript to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2024-29508)

    It was discovered that Ghostscript incorrectly handled certain PDF passwords that contained NULL bytes. 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 and Ubuntu 24.04 LTS. (CVE-2024-29509)

    It was discovered that Ghostscript incorrectly handled certain certain file paths when doing OCR. An
    attacker could use this issue to read arbitrary files and write error messages to arbitrary files. This
    issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-29511)

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-6897-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/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:R/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-2024-29509");

  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:"2024/06/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/07/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/07/15");

  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:"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) 2024 Canonical, Inc. / NASL script (C) 2024 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)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.04', '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': '20.04', 'pkgname': 'ghostscript', 'pkgver': '9.50~dfsg-5ubuntu4.13'},
    {'osver': '20.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.50~dfsg-5ubuntu4.13'},
    {'osver': '20.04', 'pkgname': 'libgs-dev', 'pkgver': '9.50~dfsg-5ubuntu4.13'},
    {'osver': '20.04', 'pkgname': 'libgs9', 'pkgver': '9.50~dfsg-5ubuntu4.13'},
    {'osver': '20.04', 'pkgname': 'libgs9-common', 'pkgver': '9.50~dfsg-5ubuntu4.13'},
    {'osver': '22.04', 'pkgname': 'ghostscript', 'pkgver': '9.55.0~dfsg1-0ubuntu5.9'},
    {'osver': '22.04', 'pkgname': 'ghostscript-x', 'pkgver': '9.55.0~dfsg1-0ubuntu5.9'},
    {'osver': '22.04', 'pkgname': 'libgs-dev', 'pkgver': '9.55.0~dfsg1-0ubuntu5.9'},
    {'osver': '22.04', 'pkgname': 'libgs9', 'pkgver': '9.55.0~dfsg1-0ubuntu5.9'},
    {'osver': '22.04', 'pkgname': 'libgs9-common', 'pkgver': '9.55.0~dfsg1-0ubuntu5.9'},
    {'osver': '24.04', 'pkgname': 'ghostscript', 'pkgver': '10.02.1~dfsg1-0ubuntu7.3'},
    {'osver': '24.04', 'pkgname': 'libgs-common', 'pkgver': '10.02.1~dfsg1-0ubuntu7.3'},
    {'osver': '24.04', 'pkgname': 'libgs-dev', 'pkgver': '10.02.1~dfsg1-0ubuntu7.3'},
    {'osver': '24.04', 'pkgname': 'libgs10', 'pkgver': '10.02.1~dfsg1-0ubuntu7.3'},
    {'osver': '24.04', 'pkgname': 'libgs10-common', 'pkgver': '10.02.1~dfsg1-0ubuntu7.3'}
];

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 (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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');
}