Apache HTTP Server Improper Access Control Vulnerability - CVE-2016-4979
The Apache HTTP Server 2.4.18 through 2.4.20 when mod_http2 and mod_ssl are enabled does not properly recognize the quotSSLVerifyClient requirequot directive for HTTP/2 request authorization which allows remote attackers to bypass intended access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation.