F5 Networks BIG-IP : BIG-IP APM VPN vulnerability (K71891773)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K71891773.
#
# @NOAGENT@
##

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

if (description)
{
  script_id(154677);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/03");

  script_cve_id("CVE-2021-23002");

  script_name(english:"F5 Networks BIG-IP : BIG-IP APM VPN vulnerability (K71891773)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The version of F5 Networks BIG-IP installed on the remote host is prior to 13.1.3.6 / 14.1.4 / 15.1.2.1 / 16.0.1.1 /
16.1.0. It is, therefore, affected by a vulnerability as referenced in the K71891773 advisory.

  - When using BIG-IP APM 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before
    13.1.3.6, or all 12.1.x and 11.6.x versions or Edge Client versions 7.2.1.x before 7.2.1.1, 7.1.9.x before
    7.1.9.8, or 7.1.8.x before 7.1.8.5, the session ID is visible in the arguments of the f5vpn.exe command
    when VPN is launched from the browser on a Windows system. Addressing this issue requires both the client
    and server fixes. Note: Software versions which have reached End of Software Development (EoSD) are not
    evaluated. (CVE-2021-23002)

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://my.f5.com/manage/s/article/K71891773");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K71891773.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:S/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-23002");

  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:"2021/03/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/28");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  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_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 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", "Settings/ParanoidReport");

  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');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var sol = 'K71891773';
var vmatrix = {
  'APM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.2','14.1.0-14.1.3','13.1.0-13.1.3','12.1.0-12.1.5','11.6.1-11.6.5'
    ],
    'unaffected': [
      '16.1.0','16.0.1.1','15.1.2.1','14.1.4','13.1.3.6'
    ],
  }
};

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_NOTE,
      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');
}