Ubuntu 16.04 ESM : CUPS vulnerabilities (USN-5454-2)

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5454-2. 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(161728);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id("CVE-2019-8842", "CVE-2020-10001", "CVE-2022-26691");
  script_xref(name:"USN", value:"5454-2");

  script_name(english:"Ubuntu 16.04 ESM : CUPS vulnerabilities (USN-5454-2)");

  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 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-5454-2 advisory.

    USN-5454-1 fixed several vulnerabilities in CUPS. This update provides the corresponding update for Ubuntu
    16.04 ESM.

    Original advisory details:

    Joshua Mason discovered that CUPS incorrectly handled the secret key used

    to access the administrative web interface. A remote attacker could

    possibly use this issue to open a session as an administrator and execute

    arbitrary code. (CVE-2022-26691)

    It was discovered that CUPS incorrectly handled certain memory operations

    when handling IPP printing. A remote attacker could possibly use this issue

    to cause CUPS to crash, leading to a denial of service, or obtain sensitive

    information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04

    LTS.

    (CVE-2019-8842, CVE-2020-10001)

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-5454-2");
  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:C/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:H/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-2022-26691");

  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:"2022/05/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/01");

  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:"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:"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) 2022-2024 Canonical, Inc. / NASL script (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.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)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04', '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 ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '16.04', 'pkgname': 'cups', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-bsd', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-client', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-common', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-core-drivers', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-daemon', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-ipp-utils', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-ppdc', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'cups-server-common', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcups2', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcups2-dev', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupscgi1', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupscgi1-dev', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupsimage2', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupsimage2-dev', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupsmime1', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupsmime1-dev', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupsppdc1', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libcupsppdc1-dev', 'pkgver': '2.1.3-4ubuntu0.11+esm1', 'ubuntu_pro': TRUE}
];

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'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) {
        flag++;
        if (!ubuntu_pro_detected && !pro_caveat_needed) pro_caveat_needed = pro_required;
    }
  }
}

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  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, 'cups / cups-bsd / cups-client / cups-common / cups-core-drivers / etc');
}