Wiz
Vulnerability DatabaseCVE-2020-27713

CVE-2020-27713: 
F5 BIG-IP Advanced Firewall Manager vulnerability analysis and mitigation

Overview

In certain configurations on version 13.1.3.4, when a BIG-IP AFM HTTP security profile is applied to a virtual server and the BIG-IP system receives a request with specific characteristics, the connection is reset and the Traffic Management Microkernel (TMM) leaks memory (NVD).

Technical details

The vulnerability has been assigned a CVSS v3.1 Base Score of 7.5 HIGH with vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The vulnerability is classified under CWE-401 (Missing Release of Memory after Effective Lifetime) (NVD).

Impact

When exploited, this vulnerability can lead to memory leaks in the Traffic Management Microkernel (TMM) and connection resets, potentially affecting the availability of the BIG-IP system (NVD).

Exploitability

The vulnerability can be triggered when specific requests are sent to a virtual server that has a BIG-IP AFM HTTP security profile applied. The attack requires no privileges or user interaction, making it relatively straightforward to exploit (NVD).

Mitigation and workarounds

F5 has released a security advisory with mitigation information. Users should refer to K37960100 for detailed mitigation steps and patching information (F5 Advisory).

Additional resources

Source: This report was generated using AI

Related F5 BIG-IP Advanced Firewall Manager vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-41433HIGH8.7
  • F5 BIG-IP Advanced Firewall Manager logoF5 BIG-IP Advanced Firewall Manager
  • cpe:2.3:a:f5:big-ip_local_traffic_manager
NoYesMay 07, 2025
CVE-2025-41431HIGH8.7
  • F5 BIG-IP Advanced Firewall Manager logoF5 BIG-IP Advanced Firewall Manager
  • cpe:2.3:a:f5:big-ip_access_policy_manager
NoYesMay 07, 2025
CVE-2025-41414HIGH8.7
  • F5 BIG-IP Advanced Firewall Manager logoF5 BIG-IP Advanced Firewall Manager
  • cpe:2.3:a:f5:big-ip_domain_name_system
NoYesMay 07, 2025
CVE-2025-41399HIGH8.7
  • F5 BIG-IP Advanced Firewall Manager logoF5 BIG-IP Advanced Firewall Manager
  • cpe:2.3:a:f5:big-ip_application_security_manager
NoYesMay 07, 2025
CVE-2025-54500MEDIUM6.9
  • F5 BIG-IP Advanced Firewall Manager logoF5 BIG-IP Advanced Firewall Manager
  • cpe:2.3:a:f5:big-ip_advanced_firewall_manager
NoYesAug 13, 2025

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Additional Wiz resources

Cloud Vulnerability DB

Cloud Vulnerability DB

A community-led vulnerabilities database

Cloud Threat Landscape

Cloud Threat Landscape

A threat intelligence database

PEACH

PEACH

A tenant isolation framework

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management
Get a demo