cve/2009/CVE-2009-5155.md

### [CVE-2009-5155](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-5155)
![](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

In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of service (assertion failure and application exit) or trigger an incorrect result by attempting a regular-expression match.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/flyrev/security-scan-ci-presentation
- https://github.com/iakovmarkov/prometheus-vuls-exporter
- https://github.com/nedenwalker/spring-boot-app-using-gradle
- https://github.com/nedenwalker/spring-boot-app-with-log4j-vuln
- https://github.com/thegeeklab/audit-exporter