apache2: DoS for HTTP/2 connections by continuous SETTINGS (CVE-2018-11763)

In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time
without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.

Fixed in Version:

Apache httpd 2.4.35

References:

https://httpd.apache.org/security/vulnerabilities\_24.html

(from redmine: issue id 9576, created on 2018-10-25, closed on 2018-10-29)

• Relations:
  • child #9577 (closed)
  • child #9578 (closed)
  • child #9579 (closed)
  • child #9580 (closed)
  • child #9581 (closed)