Some HTTP/2 implementations are vulnerable to...
High severity
Unreviewed
Published
May 24, 2022
to the GitHub Advisory Database
•
Updated Feb 1, 2023
Description
Published by the National Vulnerability Database
Aug 13, 2019
Published to the GitHub Advisory Database
May 24, 2022
Last updated
Feb 1, 2023
Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.
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