rpcapd/daemon.c in libpcap before 1.9.1 on non-Windows platforms provides details about why authentication failed, which might make it easier for attackers to enumerate valid usernames.
- https://github.com/the-tcpdump-group/libpcap/blob/libpcap-1.9/CHANGES
- https://www.oracle.com/security-alerts/cpuapr2020.html
No PoCs found on GitHub currently.