CVE-2018-11763

Published: 25 September 2018

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.

Priority

Medium

CVSS 3 base score: 5.9

Status

Notes

artful and older don't enable http2 in the build.
see CVE-2018-1302 for a whole http2 backport requirement

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11763
• http://www.securitytracker.com/id/1041713
• https://httpd.apache.org/security/vulnerabilities_24.html
• https://ubuntu.com/security/notices/USN-3783-1
• NVD
• Launchpad
• Debian

Bugs

• http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=909591