ASA-2019-00517 – Apache HTTP Server: Stack buffer overflow and NULL pointer dereference in mod_remoteip

When mod_remoteip was configured to use a trusted intermediary proxy server using the "PROXY" protocol, a specially crafted PROXY header could trigger a stack buffer overflow or NULL pointer deference. This vulnerability could only be triggered by a trusted proxy and not by untrusted HTTP clients.

ASA-2019-00516 – Apache HTTP Server: mod_http2, DoS attack by exhausting h2 workers

A malicious client could perform a DoS attack by flooding a connection with requests and basically never reading responses on the TCP connection. Depending on h2 worker dimensioning, it was possible to block those with relatively few connections.