Debian DSA-5387-1 : openvswitch - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5387. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(174273);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/25");

  script_cve_id("CVE-2023-1668");

  script_name(english:"Debian DSA-5387-1 : openvswitch - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dsa-5387
advisory.

  - A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the
    datapath flow without the action modifying the IP header. This issue results (for both kernel and
    userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for
    this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a !=
    0 IP protocol that matches this dp flow. (CVE-2023-1668)

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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034042");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/openvswitch");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2023/dsa-5387");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-1668");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/openvswitch");
  script_set_attribute(attribute:"solution", value:
"Upgrade the openvswitch packages.

For the stable distribution (bullseye), this problem has been fixed in version 2.15.0+ds1-2+deb11u4.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/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:N/AC:L/PR:N/UI:N/S:U/C:L/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-2023-1668");

  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:"2023/04/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/04/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/04/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-ipsec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-pki");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-switch");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-switch-dpdk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-testcontroller");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvswitch-vtep");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-openvswitch");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/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);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '11.0', 'prefix': 'openvswitch-common', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-dbg', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-dev', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-ipsec', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-pki', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-switch', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-switch-dpdk', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-testcontroller', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'openvswitch-vtep', 'reference': '2.15.0+ds1-2+deb11u4'},
    {'release': '11.0', 'prefix': 'python3-openvswitch', 'reference': '2.15.0+ds1-2+deb11u4'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'openvswitch-common / openvswitch-dbg / openvswitch-dev / etc');
}