cve/2023/CVE-2023-31130.md

### [CVE-2023-31130](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-31130)
![](https://img.shields.io/static/v1?label=Product&message=c-ares&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%201.19.1%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-124%3A%20Buffer%20Underwrite%20('Buffer%20Underflow')&color=brighgreen)

### Description

c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular "0::00:00:00/2" was found to cause an issue.  C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds