c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular "0::00:00:00/2" was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1.
The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| https://github.com/c-ares/c-ares/security/advisories/GHSA-x6mf-cxr9-8q6v | third party advisory |
| https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1 | release notes |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/ | third party advisory mailing list |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/ | third party advisory mailing list |
| https://www.debian.org/security/2023/dsa-5419 | third party advisory |
| https://lists.debian.org/debian-lts-announce/2023/06/msg00034.html | mailing list |
| https://security.gentoo.org/glsa/202310-09 | third party advisory |
| https://security.netapp.com/advisory/ntap-20240605-0005/ |