Vulnerability Monitor

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CVE-2024-25629

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.

Published

2024-02-23T15:15:09.237

Last Modified

2025-02-05T21:41:30.157

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 4.4 (MEDIUM)

Weaknesses

Type: Secondary
CWE-127
Type: Primary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	c-ares	c-ares	< 1.27.0	Yes
Operating System	fedoraproject	fedora	38	Yes
Operating System	fedoraproject	fedora	39	Yes
Operating System	fedoraproject	fedora	40	Yes

References

https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183 Patch ([email protected])
https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q Vendor Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/[email protected]/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/ Mailing List ([email protected])
https://lists.fedoraproject.org/archives/list/[email protected]/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/ Mailing List ([email protected])
https://lists.fedoraproject.org/archives/list/[email protected]/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/ Mailing List ([email protected])
https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/[email protected]/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/ Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/[email protected]/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/ Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/[email protected]/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/ Mailing List (af854a3a-2127-422b-91ae-364da2661108)