Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : CUPS vulnerabilities (USN-4340-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4340-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136029);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id("CVE-2019-2228", "CVE-2020-3898");
  script_xref(name:"USN", value:"4340-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : CUPS vulnerabilities (USN-4340-1)");

  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 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-4340-1 advisory.

    It was discovered that CUPS incorrectly handled certain language values. A local attacker could possibly
    use this issue to cause CUPS to crash, leading to a denial of service, or possibly obtain sensitive
    information. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10.
    (CVE-2019-2228)

    Stephan Zeisberg discovered that CUPS incorrectly handled certain malformed ppd files. A local attacker
    could possibly use this issue to execute arbitrary code. (CVE-2020-3898)

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-4340-1");
  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:N");
  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:L/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-2019-2228");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-3898");

  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:"2019/12/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-bsd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-core-drivers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-ipp-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-ppdc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:cups-server-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcups2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcups2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupscgi1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupscgi1-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupsimage2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupsimage2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupsmime1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupsmime1-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupsppdc1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcupsppdc1-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04', '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': 'cups', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-bsd', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-client', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-common', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-core-drivers', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-daemon', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-ipp-utils', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-ppdc', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'cups-server-common', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcups2', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcups2-dev', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupscgi1', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupscgi1-dev', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupsimage2', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupsimage2-dev', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupsmime1', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupsmime1-dev', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupsppdc1', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '16.04', 'pkgname': 'libcupsppdc1-dev', 'pkgver': '2.1.3-4ubuntu0.11'},
    {'osver': '18.04', 'pkgname': 'cups', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-bsd', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-client', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-common', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-core-drivers', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-daemon', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-ipp-utils', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-ppdc', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'cups-server-common', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'libcups2', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'libcups2-dev', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'libcupscgi1', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'libcupsimage2', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'libcupsimage2-dev', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'libcupsmime1', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '18.04', 'pkgname': 'libcupsppdc1', 'pkgver': '2.2.7-1ubuntu2.8'},
    {'osver': '20.04', 'pkgname': 'cups', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-bsd', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-client', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-common', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-core-drivers', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-daemon', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-ipp-utils', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-ppdc', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'cups-server-common', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libcups2', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libcups2-dev', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libcupsimage2', 'pkgver': '2.3.1-9ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libcupsimage2-dev', 'pkgver': '2.3.1-9ubuntu1.1'}
];

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_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, 'cups / cups-bsd / cups-client / cups-common / cups-core-drivers / etc');
}