CVE-2024-25629
c-ares out of bounds read in ares__read_line()
- State
- Published
- Severity
- 4.4 Medium
- Published
- Feb 23, 2024
- Updated
- Feb 13, 2025
- Reserved
- Feb 8, 2024
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.4 Medium | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-127 Buffer Under-read
Affected Products
| Product | Versions |
|---|---|
c-aresc-ares |
|
References
- https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q
- https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/
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