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TI-2018-04014 Aliases CVE-2018-5509GHSA-wc9j-qv4j-w6v6

Improper input validation in F5 BIG-IP

Priority LOW 38CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

On F5 BIG-IP versions 13.0.0 or 12.1.0 - 12.1.3.1, when a specifically configured virtual server receives traffic of an undisclosed nature, TMM will crash and take the configured failover action, potentially causing a denial of service. The configuration which exposes this issue is not common and in general does not work when enabled in previous versions of BIG-IP. Starting in 12.1.0, BIG-IP will crash if the configuration which exposes this issue is enabled and the virtual server receives non TCP traffic. With the fix of this issue, additional configuration validation logic has been added to prevent this configuration from being applied to a virtual server. There is only data plane exposure to this issue with a non-standard configuration. There is no control plane exposure.

Why it matters now

EPSS 0.02755 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
F5BIG-IP (LTM, AAM, AFM, APM, ASM, Link Controller, PEM, WebSafe)13.0.0; 12.1.0 - 12.1.3.1—No fix listedCNA
  • BIG-IP (LTM, AAM, AFM, APM, ASM, Link Controller, PEM, WebSafe) VendorF5 Affected 13.0.0; 12.1.0 - 12.1.3.1 Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4VulnerableF5
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4VulnerableF5
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.3.1.2; 13.0.0 to before 13.1.0.4VulnerableF5
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4VulnerableF5
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4VulnerableF5
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4VulnerableF5
cpe:2.3:a:f5:big-ip_websafe:1.0.0:*:*:*:*:*:*:*1.0.0VulnerableF5
  • cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.3.1.2; 13.0.0 to before 13.1.0.4 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.3.2; 13.0.0 to before 13.1.0.4 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_websafe:1.0.0:*:*:*:*:*:*:* Versions 1.0.0 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-5509
  2. 2026-10-03 Alias added: GHSA-wc9j-qv4j-w6v6

References

Advisory 1

  • TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-01269 Missing authentication in F5 BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05850 Memory corruption in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
See all 629 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences