Ubuntu 16.04 ESM : Open vSwitch vulnerability (USN-5698-2)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5698-2. 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(166500);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/08");

  script_cve_id("CVE-2022-32166");
  script_xref(name:"USN", value:"5698-2");

  script_name(english:"Ubuntu 16.04 ESM : Open vSwitch vulnerability (USN-5698-2)");

  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 host has packages installed that are affected by a vulnerability as referenced in the
USN-5698-2 advisory.

  - In ovs versions v0.90.0 through v2.5.0 are vulnerable to heap buffer over-read in flow.c. An unsafe
    comparison of minimasks function could lead access to an unmapped region of memory. This vulnerability
    is capable of crashing the software, memory modification, and possible remote execution. (CVE-2022-32166)

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-5698-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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: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-2022-32166");

  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:"2022/09/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/25");

  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:openvswitch-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openvswitch-ipsec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openvswitch-pki");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openvswitch-switch");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openvswitch-switch-dpdk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openvswitch-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openvswitch-testcontroller");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openvswitch-vtep");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-central");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-openvswitch");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 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)) 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 pkgs = [
    {'osver': '16.04', 'pkgname': 'openvswitch-common', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'openvswitch-ipsec', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'openvswitch-pki', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'openvswitch-switch', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'openvswitch-switch-dpdk', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'openvswitch-test', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'openvswitch-testcontroller', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'openvswitch-vtep', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'ovn-central', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'ovn-common', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'ovn-host', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'},
    {'osver': '16.04', 'pkgname': 'python-openvswitch', 'pkgver': '2.5.9-0ubuntu0.16.04.3+esm1'}
];

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_HOLE,
    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, 'openvswitch-common / openvswitch-ipsec / openvswitch-pki / etc');
}