Man-in-the-Middle (MitM) Affecting matrix-js-sdk package, versions <12.4.1
Threat Intelligence
EPSS
0.08% (37th
percentile)
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Test your applications- Snyk ID SNYK-JS-MATRIXJSSDK-1586045
- published 17 Sep 2021
- disclosed 17 Sep 2021
- credit Unknown
Introduced: 17 Sep 2021
CVE-2021-40823 Open this link in a new tabHow to fix?
Upgrade matrix-js-sdk to version 12.4.1 or higher.
Overview
matrix-js-sdk is a Matrix Client-Server SDK for Javascript
Affected versions of this package are vulnerable to Man-in-the-Middle (MitM). A logic error in the room key sharing functionality allows a malicious Matrix homeserver present in an encrypted room to steal room encryption keys (via crafted Matrix protocol messages) that were originally sent by affected Matrix clients participating in that room. This allows the homeserver to decrypt end-to-end encrypted messages sent by affected clients.
References
CVSS Scores
version 3.1