Vulnerability in Socket Engine.io
CVE-2022-21676
Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This impacts all the users of the `engine.io` package starting from version `4.0.0`, including those who uses depending packages like `socket.io`. Versions prior to `4.0.0` are not impacted. A fix has been released for each major branch, namely `4.1.2` for the `4.x.x` branch, `5.2.1` for the `5.x.x` branch, and `6.1.1` for the `6.x.x` branch. There is no known workaround except upgrading to a safe version.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.028 (85.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Socket Engine.io
- Socketio Engine.io — versions >= 4.0.0, < 4.1.2, >= 5.0.0, < 5.2.1, >= 6.0.0, < 6.1.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/socketio/engine.io/security/advisories/GHSA-273r-mgr4-v34f (Third Party Advisory)
- github.com/socketio/engine.io/commit/66f889fc1d966bf5bfa0de1939069153643874ab (Patch, Third Party Advisory)
- github.com/socketio/engine.io/commit/a70800d7e96da32f6e6622804ef659ebc58659db (Patch, Third Party Advisory)
- github.com/socketio/engine.io/commit/c0e194d44933bd83bf9a4b126fca68ba7bf5098c (Patch, Third Party Advisory)
- github.com/socketio/engine.io/releases/tag/4.1.2 (Third Party Advisory, Release Notes)
- github.com/socketio/engine.io/releases/tag/5.2.1 (Third Party Advisory, Release Notes)
- github.com/socketio/engine.io/releases/tag/6.1.1 (Third Party Advisory, Release Notes)
- security.netapp.com/advisory/ntap-20220209-0002/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-21676?
- CVE-2022-21676 is a high-severity vulnerability in Socket Engine.io, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2022-01-12.
- How severe is CVE-2022-21676?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-21676 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.