RHEL 7 : openvswitch (RHSA-2017:2553)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:2553. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(210277);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/11/05");

  script_cve_id("CVE-2017-9214", "CVE-2017-9263", "CVE-2017-9265");
  script_xref(name:"RHSA", value:"2017:2553");

  script_name(english:"RHEL 7 : openvswitch (RHSA-2017:2553)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for openvswitch.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2017:2553 advisory.

    Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote
    per-flow control of traffic.

    Security Fix(es):

    * An unsigned int wrap around leading to a buffer over-read was found when parsing
    OFPT_QUEUE_GET_CONFIG_REPLY messages in Open vSwitch (OvS). An attacker could use this flaw to cause a
    remote DoS. (CVE-2017-9214)

    * In Open vSwitch (OvS), while parsing an OpenFlow role status message there is a call to the abort()
    function for undefined role status reasons in the function `ofp_print_role_status_message` in `lib/ofp-
    print.c` that may be leveraged toward a remote DoS attack by a malicious switch. (CVE-2017-9263)

    * A buffer over-read flaw was found in Open vSwitch (OvS) while parsing the group mod OpenFlow messages
    sent from the controller. An attacker could use this flaw to cause a Denial of Service (DoS).
    (CVE-2017-9265)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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://access.redhat.com/security/updates/classification/#moderate");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1431494");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1456795");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1457327");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1457335");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2017/rhsa-2017_2553.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5107649");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2017:2553");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL openvswitch package based on the guidance in RHSA-2017:2553.");
  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-2017-9265");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 122, 190);
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/11/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openvswitch");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-openvswitch");
  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) 2024 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: '7')) audit(AUDIT_OS_NOT, 'Red Hat 7.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/rhel/client/7/7Client/x86_64/openstack-tools/9/debug',
      'content/dist/rhel/client/7/7Client/x86_64/openstack-tools/9/os',
      'content/dist/rhel/client/7/7Client/x86_64/openstack-tools/9/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/9/debug',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/9/os',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/9/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/9/debug',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/9/os',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/9/source/SRPMS',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/9/debug',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/9/os',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/9/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'openvswitch-2.5.0-15.git20160727.el7ost', 'cpu':'x86_64', 'release':'7', 'el_string':'el7ost', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openstack-'},
      {'reference':'python-openvswitch-2.5.0-15.git20160727.el7ost', 'release':'7', 'el_string':'el7ost', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openstack-'}
    ]
  }
];

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;
    var cves = 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 (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    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, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  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, 'openvswitch / python-openvswitch');
}