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CVE-2022-21676

7.5 · HIGH

Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO.

Published Jan 12, 2022CWE-754EPSS 2.76%

Overview

CVE-2022-21676 is a high-severity vulnerability. It was published on January 12, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/socketio/engine.io/commit/66f889fc1d966bf5bfa0de1939069153643874abGitHubgithub.com/socketio/engine.io/commit/a70800d7e96da32f6e6622804ef659ebc58659dbGitHubgithub.com/socketio/engine.io/commit/c0e194d44933bd83bf9a4b126fca68ba7bf5098cGitHubgithub.com/socketio/engine.io/releases/tag/4.1.2GitHubgithub.com/socketio/engine.io/releases/tag/5.2.1GitHubgithub.com/socketio/engine.io/releases/tag/6.1.1GitHubgithub.com/socketio/engine.io/security/advisories/GHSA-273r-mgr4-v34fRefsecurity.netapp.com/advisory/ntap-20220209-0002/GitHubgithub.com/socketio/engine.io/commit/66f889fc1d966bf5bfa0de1939069153643874abGitHubgithub.com/socketio/engine.io/commit/a70800d7e96da32f6e6622804ef659ebc58659db

How CyberStrike helps

Frequently asked questions

What is CVE-2022-21676?

CVE-2022-21676 is a high-severity vulnerability. It was published on January 12, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2022-21676?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-21676?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-21676?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-21676 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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