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Vulnerability DatabaseCVE-2020-5883

CVE-2020-5883: 
F5 BIG-IP Advanced Firewall Manager vulnerability analysis and mitigation

Overview

On BIG-IP versions 15.0.0-15.0.1, 14.1.0-14.1.2.3, 14.0.0-14.0.1, and 13.1.0-13.1.3.1, when a virtual server is configured with HTTP explicit proxy and has an attached HTTP_PROXY_REQUEST iRule, POST requests sent to the virtual server cause an xdata memory leak (CVE Details).

Technical details

The vulnerability affects BIG-IP systems when configured with specific conditions: a virtual server using HTTP explicit proxy configuration along with an HTTP_PROXY_REQUEST iRule. When these conditions are met, POST requests to the virtual server trigger an xdata memory leak (F5 Support).

Impact

The primary impact of this vulnerability is a memory leak in the system, which could potentially lead to degraded performance or system instability over time if left unaddressed (CVE Details).

Exploitability

The vulnerability requires specific configuration conditions to be exploitable: the system must have a virtual server configured with HTTP explicit proxy and an HTTP_PROXY_REQUEST iRule. The exploit is triggered by sending POST requests to the affected virtual server (F5 Support).

Mitigation and workarounds

F5 has released patches for the affected versions. Users should upgrade to a patched version of BIG-IP to address this vulnerability (F5 Support).

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
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CVE-2025-41431HIGH8.7
  • F5 BIG-IP Advanced Firewall Manager logoF5 BIG-IP Advanced Firewall Manager
  • cpe:2.3:a:f5:big-ip_advanced_firewall_manager
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CVE-2025-41414HIGH8.7
  • 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-2025-41399HIGH8.7
  • 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_domain_name_system
NoYesAug 13, 2025

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