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.

NVD

Severity: N/A
CVE ID: CVE-2024-27983
CVSS Score: N/A
CVSS Metrics: NVD assessment not yet provided.

HackerOne

Severity: HIGH
CVE ID: CVE-2024-27983
CVSS Score: 8.2
CVSS Metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Refrence: NVDMITRE

Proof Of Concept

lirantal

CVE-2024-27983 this repository builds up a vulnerable HTTP2 Node.js server (server-nossl.js) based on CVE-2024-27983 which exploits a continuation flood vulnerability in HTTP2 servers.

Refrence: GitHub