Reported

April 14, 2023

Issued

April 20, 2023

Package

h2 (crates.io)

Type

Vulnerability

Categories

• denial-of-service

Keywords

#http #http2 #h2

Aliases

• CVE-2023-26964
• GHSA-f8vr-r385-rh5r

References

• https://github.com/hyperium/hyper/issues/2877

Patched

• >=0.3.17

Description

If an attacker is able to flood the network with pairs of HEADERS/RST_STREAM frames, such that the h2 application is not able to accept them faster than the bytes are received, the pending accept queue can grow in memory usage. Being able to do this consistently can result in excessive memory use, and eventually trigger Out Of Memory.

This flaw is corrected in hyperium/h2#668, which restricts remote reset stream count by default.

Advisory available under CC0-1.0 license.