CVE-2023-29529

published 2023-04-14

CVE-2023-29529: matrix-js-sdk is the Matrix Client-Server SDK for JavaScript and TypeScript. An attacker present in a room where an MSC3401 group call is taking place can…

Priority P4 27 medium 5.3 CVSS 3.1

AV N AC L PR N UI N S U C L I N A N

matrix-js-sdk is the Matrix Client-Server SDK for JavaScript and TypeScript. An attacker present in a room where an MSC3401 group call is taking place can eavesdrop on the video and audio of participants using matrix-js-sdk, without their knowledge. To affected matrix-js-sdk users, the attacker will not appear to be participating in the call. This attack is possible because matrix-js-sdk's group call implementation accepts incoming direct calls from other users, even if they have not yet declared intent to participate in the group call, as a means of resolving a race condition in call setup. Affected versions do not restrict access to the user's outbound media in this case. Legacy 1:1 calls are unaffected. This is fixed in matrix-js-sdk 24.1.0. As a workaround, users may hold group calls in private rooms where only the exact users who are expected to participate in the call are present.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
debian	node-matrix-js-sdk	—	—
matrix-org	matrix-js-sdk	< 24.1.0	24.1.0
matrix-org	matrix-js-sdk	>= 0 < 24.1.0	24.1.0
matrix	javascript_sdk	< 24.1.0	24.1.0

CVSS provenance

nvd v3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

osv 5.3 MEDIUM

vendor_debian 5.0 MEDIUM

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CWE-862