RHEL 8 : openvswitch3.1 (RHSA-2023:1766)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2023:1766. The text
# itself is copyright (C) Red Hat, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(174267);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/05/24");

  script_cve_id("CVE-2023-1668");
  script_xref(name:"RHSA", value:"2023:1766");

  script_name(english:"RHEL 8 : openvswitch3.1 (RHSA-2023:1766)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2023:1766 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://access.redhat.com/security/cve/CVE-2023-1668");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2023:1766");
  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: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_cwe_id(670);

  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:"2023/04/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:network-scripts-openvswitch3.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openvswitch3.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openvswitch3.1-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openvswitch3.1-ipsec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openvswitch3.1-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-openvswitch3.1");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat 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", "redhat_repos.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) 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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/layered/rhel8/aarch64/fast-datapath/debug',
      'content/dist/layered/rhel8/aarch64/fast-datapath/os',
      'content/dist/layered/rhel8/aarch64/fast-datapath/source/SRPMS',
      'content/dist/layered/rhel8/ppc64le/fast-datapath/debug',
      'content/dist/layered/rhel8/ppc64le/fast-datapath/os',
      'content/dist/layered/rhel8/ppc64le/fast-datapath/source/SRPMS',
      'content/dist/layered/rhel8/s390x/fast-datapath/debug',
      'content/dist/layered/rhel8/s390x/fast-datapath/os',
      'content/dist/layered/rhel8/s390x/fast-datapath/source/SRPMS',
      'content/dist/layered/rhel8/x86_64/fast-datapath/debug',
      'content/dist/layered/rhel8/x86_64/fast-datapath/os',
      'content/dist/layered/rhel8/x86_64/fast-datapath/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'network-scripts-openvswitch3.1-3.1.0-17.el8fdp', 'release':'8', 'el_string':'el8fdp', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openvswitch'},
      {'reference':'openvswitch3.1-3.1.0-17.el8fdp', 'release':'8', 'el_string':'el8fdp', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openvswitch'},
      {'reference':'openvswitch3.1-devel-3.1.0-17.el8fdp', 'release':'8', 'el_string':'el8fdp', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openvswitch'},
      {'reference':'openvswitch3.1-ipsec-3.1.0-17.el8fdp', 'release':'8', 'el_string':'el8fdp', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openvswitch'},
      {'reference':'openvswitch3.1-test-3.1.0-17.el8fdp', 'release':'8', 'el_string':'el8fdp', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openvswitch'},
      {'reference':'python3-openvswitch3.1-3.1.0-17.el8fdp', 'release':'8', 'el_string':'el8fdp', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openvswitch'}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_array['pkgs'] ) {
    var reference = NULL;
    var _release = NULL;
    var sp = NULL;
    var _cpu = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var epoch = NULL;
    var allowmaj = NULL;
    var exists_check = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (reference &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&
        rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  if (empty_or_null(applicable_repo_urls)) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get() + redhat_report_package_caveat();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'network-scripts-openvswitch3.1 / openvswitch3.1 / openvswitch3.1-devel / etc');
}