cve/2021/CVE-2021-27645.md

### [CVE-2021-27645](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27645)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/dispera/giant-squid
- https://github.com/domyrtille/interview_project
- https://github.com/epequeno/devops-demo
- https://github.com/onzack/trivy-multiscanner