CVE-2021-40823 | BDVDB-2026-160791 Detail

Description#

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.

Impact#

No impact statement in the source data.

Weaknesses#

No weakness recorded in the source data.

References#

https://github.com/matrix-org/matrix-js-sdk/releases/tag/v12.4.1
https://matrix.org/blog/2021/09/13/vulnerability-disclosure-key-sharing

Exploit#

No public exploit known

History#

Version 12021-09-13Record published in the CVE List.
Version 22024-08-04Most recent update recorded in the CVE List.