CVE-2024-27983

2024-04-0901:06:43

hackerone

github.com

cve-2024-27983

node.js

http/2

server

vulnerability

unavailability

nghttp2

memory

reset

tcp

connection

http/2 continuation

frame

race condition

CVSS3

8.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

AI Score

8.2

Confidence

High

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

JSON

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.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:nodejs:nodejs:*:*:*:*:*:*:*:*"
    ],
    "vendor": "nodejs",
    "product": "nodejs",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "versionType": "custom",
        "lessThanOrEqual": "18.20.0"
      },
      {
        "status": "affected",
        "version": "0",
        "versionType": "custom",
        "lessThanOrEqual": "20.12.0"
      },
      {
        "status": "affected",
        "version": "0",
        "versionType": "custom",
        "lessThanOrEqual": "21.7.1"
      }
    ],
    "defaultStatus": "unknown"
  }
]