cve/2021/CVE-2021-27290.md

### [CVE-2021-27290](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27290)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option.

### POC

#### Reference
- https://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdf
- https://www.oracle.com/security-alerts/cpuoct2021.html

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