ghsa-6g67-q39g-r79q
Vulnerability from github
Published
2023-04-14 16:14
Modified
2023-04-25 16:35
Severity ?
5.0 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Summary
matrix-js-sdk vulnerable to invisible eavesdropping in group calls
Details

Impact

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.

Workarounds

Users may hold group calls in private rooms where only the exact users who are expected to participate in the call are present.

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "matrix-js-sdk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-29529"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-04-14T16:14:17Z",
    "nvd_published_at": "2023-04-14T19:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nAn 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.\n\nThis attack is possible because matrix-js-sdk\u0027s 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\u0027s outbound media in this case.\n\nLegacy 1:1 calls are unaffected.\n\n### Workarounds\n\nUsers may hold group calls in private rooms where only the exact users who are expected to participate in the call are present.",
  "id": "GHSA-6g67-q39g-r79q",
  "modified": "2023-04-25T16:35:38Z",
  "published": "2023-04-14T16:14:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6g67-q39g-r79q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-29529"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3401"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/matrix-js-sdk"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v24.1.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "matrix-js-sdk vulnerable to invisible eavesdropping in group calls"
}


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