F5 Networks BIG-IP : Intel SMM vulnerability (K000162855)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K000162855.
#
# @NOAGENT@
##

include('compat.inc');

if (description)
{
  script_id(338448);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/20");

  script_cve_id("CVE-2025-20028");

  script_name(english:"F5 Networks BIG-IP : Intel SMM vulnerability (K000162855)");

  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 tested version. It is, therefore, affected by
a vulnerability as referenced in the K000162855 advisory.

    Time-of-check time-of-use race condition in the WheaERST SMM module for some Intel(R) reference platforms
    may allow an escalation of privilege. System software adversary with a privileged user combined with a
    high complexity attack may enable escalation of privilege. This result may potentially occur via local
    access when attack requirements are present without special internal knowledge and requires no user
    interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and
    availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none),
    integrity (none) and availability (none) impacts.(CVE-2025-20028)

Tenable has extracted the preceding description block directly from the F5 Networks BIG-IP security advisory.

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/K000162855");
  script_set_attribute(attribute:"solution", value:
"The vendor has acknowledged the vulnerability, but no solution has been provided.
Refer to the vendor for remediation guidance.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:M/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:H/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:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-20028");

  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:"2026/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/20");

  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:/a:f5:big-ip_advanced_firewall_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_security_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_domain_name_system");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_global_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_iapps_lx");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_irules_lx");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_local_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_policy_enforcement_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_ssl_orchestrator");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_wan_optimization_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip_protocol_security_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) 2026 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 = 'K000162855';
var vmatrix = {
  'AFM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'APM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'ASM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'DNS': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'GTM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'LTM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'PEM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'PSM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'SSL-Orchestrator': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'WOM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'iAppsLX': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  },
  'iRulesLX': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
  }
};

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_WARNING,
      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 any of the affected modules');
}