F5 Networks BIG-IP : BIG-IP APM VPN vulnerability (K20087443)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K20087443.
#
# The text description of this plugin is (C) F5 Networks.
#

include('compat.inc');

if (description)
{
  script_id(118601);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/03");

  script_cve_id("CVE-2017-6129");

  script_name(english:"F5 Networks BIG-IP : BIG-IP APM VPN vulnerability (K20087443)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"In F5 BIG-IP APM software version 13.0.0 and 12.1.2, in some
circumstances, APM tunneled VPN flows can cause a VPN/PPP connflow to
be prematurely freed or cause TMM to stop responding with a 'flow not
in use' assertion. An attacker may be able to disrupt traffic or cause
the BIG-IP system to fail over to another device in the device group.
(CVE-2017-6129)

Impact

An attacker may be able to disrupt traffic or cause the BIG-IP system
to fail over to another device in the device group.

Note : BIG-IP and BIG-IP Virtual Edition (VE) systems that are
licensed with the BIG-IP LTM module include a free perpetual license
for the BIG-IP APM Lite module. The BIG-IP LTM module is not affected
by this vulnerability; however, BIG-IP LTM systems provisioned with
the BIG-IP APM Lite module may be vulnerable. For more information
about the BIG-IP APM Lite perpetual license, refer to K15854: BIG-IP
APM Lite.");
  script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K20087443");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K20087443.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-6129");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"F5 Networks Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("f5_bigip_detect.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version");

  exit(0);
}


include('f5_func.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var version = get_kb_item('Host/BIG-IP/version');
if ( ! version ) audit(AUDIT_OS_NOT, 'F5 Networks BIG-IP');
if ( isnull(get_kb_item('Host/BIG-IP/hotfix')) ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/hotfix');
if ( ! get_kb_item('Host/BIG-IP/modules') ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/modules');

var sol = 'K20087443';
var vmatrix = {
  'APM': {
    'affected': [
      '13.0.0','12.1.2'
    ],
    'unaffected': [
      '13.1.0','13.0.1','12.1.3'
    ],
  }
};

if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  var extra = NULL;
  if (report_verbosity > 0) extra = bigip_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
}
else
{
  var tested = bigip_get_tested_modules();
  var audit_extra = 'For BIG-IP module(s) ' + tested + ',';
  if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
  else audit(AUDIT_HOST_NOT, 'running the affected module APM');
}