CVE-2023-32067

high

Description

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

References

https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1

https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc

https://lists.debian.org/debian-lts-announce/2023/06/msg00034.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/

https://lists.fedoraproject.org/archives/list/[email protected]/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/

https://security.gentoo.org/glsa/202310-09

https://www.debian.org/security/2023/dsa-5419

Details

Source: Mitre, NVD

Published: 2023-05-25

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High