CVE-2023-29529

Description

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.

How to fix CVE-2023-29529

To remediate CVE-2023-29529, upgrade the affected package to a fixed version below.

• —no fix listed
• —upgrade to 24.1.0 or later

Is CVE-2023-29529 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0
• from 0, < 24.1.0

CVSS scores

References (6)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-29529
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2023-29529
• PATCHgithub.com/matrix-org/matrix-js-sdk
• WEBgithub.com/matrix-org/matrix-js-sdk/releases/tag/v24.1.0