CVE-2024-27983

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

High · published April 9, 2024

Patch now

High probability of exploitation

CVSS calls it high at 8.2. It sits in the 99.8th percentile for exploit probability.

CVSS v3.0
8.2
EPSS
87%
Percentile
99.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
8.2 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.87211 · 99.8th percentile
Published
2024-04-09T01:06Z
EPSS history
Timeline
  • 09 APR 01:06Z
    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
    cvelistv5