cve/2024/CVE-2024-27983.md

CVE-2024-27983

Description

An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside. It is possible to leave some data in nghttp2 memory after reset when headers with HTTP/2 CONTINUATION frame are sent to the server and then a TCP connection is abruptly closed by the client triggering the Http2Session destructor while header frames are still being processed (and stored in memory) causing a race condition.

POC

Reference

No PoCs from references.

Github

• https://github.com/Ampferl/poc_http2-continuation-flood
• https://github.com/DrewskyDev/H2Flood
• https://github.com/Vos68/HTTP2-Continuation-Flood-PoC
• https://github.com/hex0punk/cont-flood-poc
• https://github.com/lirantal/CVE-2024-27983-nodejs-http2
• https://github.com/nomi-sec/PoC-in-GitHub