CVE-2023-29529
MEDIUM5.0EPSS 0.18%matrix-js-sdk vulnerable to invisible eavesdropping in group calls
Description
### Impact An attacker present in a room where an [MSC3401](https://github.com/matrix-org/matrix-spec-proposals/pull/3401) 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. ### Workarounds Users may hold group calls in private rooms where only the exact users who are expected to participate in the call are present.
Affected packages (2)
- Debian/node-matrix-js-sdkfrom 0
- npm/matrix-js-sdkfrom 0, < 24.1.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2023-29529
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2023-29529
- PATCHhttps://github.com/matrix-org/matrix-js-sdk
- WEBhttps://github.com/matrix-org/matrix-js-sdk/releases/tag/v24.1.0
- WEBhttps://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6g67-q39g-r79q
- WEBhttps://github.com/matrix-org/matrix-spec-proposals/pull/3401