CVEs-PoC/2020/CVE-2020-5243.md

### [CVE-2020-5243](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5243)
![](https://img.shields.io/static/v1?label=Product&message=uap-core&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-20%3A%20Improper%20Input%20Validation&color=brighgreen)

### Description

uap-core before 0.7.3 is vulnerable to a denial of service attack when processing crafted User-Agent strings. Some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings. This has been patched in uap-core 0.7.3.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/doyensec/regexploit
- https://github.com/engn33r/awesome-redos-security
- https://github.com/retr0-13/regexploit