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.
2023-05-25T22:15:09.760
2025-02-13T17:16:26.707
Modified
CVSSv3.1: 4.1 (MEDIUM)
Type | Vendor | Product | Version/Range | Vulnerable? |
---|---|---|---|---|
Application | c-ares_project | c-ares | < 1.19.1 | Yes |
Operating System | fedoraproject | fedora | 37 | Yes |
Operating System | fedoraproject | fedora | 38 | Yes |
Operating System | debian | debian_linux | 10.0 | Yes |
Operating System | debian | debian_linux | 11.0 | Yes |