F5 Networks BIG-IP : PHP vulnerabilities (K000163821)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K000163821.
#
# @NOAGENT@
##

include('compat.inc');

if (description)
{
  script_id(372182);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/27");

  script_cve_id("CVE-2026-109618", "CVE-2026-109619");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2026/10/29");

  script_name(english:"F5 Networks BIG-IP : PHP vulnerabilities (K000163821)");

  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 17.1.3.7 / 17.5.1.11 / 21.1.0.4 / Hotfix-
BIGIP-17.1.3.6.0.9.20-ENG / Hotfix-BIGIP-17.5.1.10.0.37.35-ENG. It is, therefore, affected by multiple vulnerabilities
as referenced in the K000163821 advisory.

    CVE-2026-109618(also known as php2shell)PHP uses longjmp() for out-of-memory (OOM) errors to exit the
    current context and abort handling of the request. Some contexts may not properly account for this
    scenario and leave request memory in an uninitialized state before performing an allocation. The
    subsequent request cleanup procedure may read or branch on this memory. Multiple OOM strategies can
    consistently trigger this condition and lead to remote code execution (RCE).CVE-2026-109619(also known as
    php2shell)PHP has various global state that temporarily points into request memory. In some scenarios,
    global state may not be correctly reset, or may be repopulated after being reset. The global state may
    then refer to request memory even after it has been freed. Subsequent requests may read or branch on this
    stale state before it is fully initialized. Multiple strategies can trigger this condition and produce
    remote code execution (RCE).

Tenable has extracted the preceding description block directly from the F5 Networks BIG-IP 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://my.f5.com/manage/s/article/K000163821");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K000163821.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/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:A");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-109618");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-109619");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/26");

  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:/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", "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 = 'K000163821';
var vmatrix = {
  'AFM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'APM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'ASM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'DNS': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'GTM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'LTM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'PEM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'PSM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'SSL-Orchestrator': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'WOM': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'iAppsLX': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  },
  'iRulesLX': {
    'affected': [
      '21.1.0','17.5.0-17.5.1','17.1.0-17.1.3'
    ],
    'unaffected': [
      '21.1.0.4','17.5.1.11','17.5.1.10.0.37.35','17.1.3.7','17.1.3.6.0.9.20'
    ],
  }
};

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 any of the affected modules');
}