RHEL 7 : openvswitch (RHSA-2017:2698)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:2698. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(210265);
  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:"2017:2698");

  script_name(english:"RHEL 7 : openvswitch (RHSA-2017:2698)");

  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-2017:2698 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 integer wrap around that led to a buffer over-read was found when parsing
    OFPT_QUEUE_GET_CONFIG_REPLY messages in Open vSwitch (OvS). An attacker could use this issue to cause a
    remote denial of service attack. (CVE-2017-9214)

    * While parsing an OpenFlow role status message Open vSwitch (OvS), a call to the abort() function for
    undefined role status reasons in the function 'ofp_print_role_status_message' in 'lib/ofp-print.c' could
    be misused for a remote denial of service attack by a malicious switch. (CVE-2017-9263)

    * A buffer over-read issue was found in Open vSwitch (OvS) which emerged while parsing the GroupMod
    OpenFlow messages sent from the controller. The issue could enable an attacker to cause a denial of
    service type of attack. (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=1431497");
  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_2698.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1bc925c5");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2017:2698");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL openvswitch package based on the guidance in RHSA-2017:2698.");
  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:"2017/09/12");
  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/7.0/debug',
      'content/dist/rhel/client/7/7Client/x86_64/openstack-tools/7.0/os',
      'content/dist/rhel/client/7/7Client/x86_64/openstack-tools/7.0/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/7.0/debug',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/7.0/os',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/7.0/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/7.0/debug',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/7.0/os',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/7.0/source/SRPMS',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/7.0/debug',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/7.0/os',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/7.0/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');
}