cve/2021/CVE-2021-22991.md

### [CVE-2021-22991](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22991)
![](https://img.shields.io/static/v1?label=Product&message=BIG-IP&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=RCE&color=brighgreen)

### Description

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, undisclosed requests to a virtual server may be incorrectly handled by the Traffic Management Microkernel (TMM) URI normalization, which may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may theoretically allow bypass of URL based access control or remote code execution (RCE). Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/DNTYO/F5_Vulnerability
- https://github.com/EdgeSecurityTeam/Vulnerability
- https://github.com/Ostorlab/KEV
- https://github.com/Ostorlab/known_exploited_vulnerbilities_detectors
- https://github.com/SexyBeast233/SecBooks
- https://github.com/r0eXpeR/supplier
- https://github.com/tzwlhack/Vulnerability