CVE-2017-9789: Apache httpd 2.4 Read after free in mod_http2

[William A Rowe Jr <wrowe () apache org>]

CVE-2017-9789: Read after free in mod_http2.c

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.4.26

Description:
When under stress, closing many connections, the HTTP/2
handling code would sometimes access memory after it has
been freed, resulting in potentially erratic behaviour.

Mitigation:
2.4.26 users of mod_http2 should upgrade to 2.4.27.

Credit:
The Apache HTTP Server security team would like to thank Robert Święcki
for reporting this issue.

References:
https://httpd.apache.org/security_report.html