# CVE-2024-25629

## Summary

- **CVE ID:** CVE-2024-25629
- **Severity:** MEDIUM
- **CVSS Score:** 4.4 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-127
- **Published:** Feb 23, 2024
- **Last Modified:** Mar 13, 2026

## 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.

## Affected Products

- c-ares — c-ares (< 1.27.0)

## References

- [CNA](https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q)
- [CNA](https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.3

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._