cve/2024/CVE-2024-25629.md

### [CVE-2024-25629](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-25629)
![](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%201.27.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-127%3A%20Buffer%20Under-read&color=brighgreen)

### Description

c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.

### POC

#### Reference
No PoCs from references.

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