A logic error in the room key sharing functionality of matrix-js-sdk (aka Matrix Javascript SDK) before 12.4.1 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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-09-13T18:45:50

Updated: 2024-08-04T02:51:06.929Z

Reserved: 2021-09-09T00:00:00

Link: CVE-2021-40823

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-09-13T19:15:19.137

Modified: 2023-08-08T14:22:24.967

Link: CVE-2021-40823

cve-icon Redhat

No data.