Amazon Linux 2023: CVE-2023-31130: Important priority package update for c-ares (Multiple Advisories)

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.
A vulnerability was found in c-ares. This issue occurs in the ares_inet_net_pton() function, which is vulnerable to a buffer underflow for certain ipv6 addresses. "0::00:00:00/2" in particular 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().