HTTP/2 CONTINUATION Flood

[madires]

For anyone running an HTTP/2 webserver: https://nowotarski.info/http2-continuation-flood/

From the webpage:

tl;dr: The CONTINUATION Flood is a class of vulnerabilities within numerous HTTP/2 protocol implementations. In many cases, it poses a more severe threat compared to the Rapid Reset: a single machine (and in certain instances, a mere single TCP connection or a handful of frames) has the potential to disrupt server availability, with consequences ranging from server crashes to substantial performance degradation. Remarkably, requests that constitute an attack are not visible in HTTP access logs.

BTW, Apache httpd v2.4.59 (includes fix) was released yesterday.