ghsa-4jf8-g8wp-cx7c
Vulnerability from github
Published
2024-10-15 18:07
Modified
2024-10-15 18:07
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
Matrix JavaScript SDK's key history sharing could share keys to malicious devices
Details

Impact

In matrix-js-sdk versions 9.11.0 through 34.7.0, the method MatrixClient.sendSharedHistoryKeys is vulnerable to interception by malicious homeservers. The method implements functionality proposed in MSC3061 and can be used by clients to share historical message keys with newly invited users, granting them access to past messages in the room.

However, it unconditionally sends these "shared" keys to all of the invited user's devices, regardless of whether the user's cryptographic identity is verified or whether the user's devices are signed by that identity. This allows the attacker to potentially inject its own devices to receive sensitive historical keys without proper security checks.

Note that this only affects clients running the SDK with the legacy crypto stack. Clients using the new Rust cryptography stack (i.e. those that call MatrixClient.initRustCrypto() instead of MatrixClient.initCrypto()) are unaffected by this vulnerability, because MatrixClient.sendSharedHistoryKeys() raises an exception in such environments.

Patches

Fixed in matrix-js-sdk 34.8.0 by removing the vulnerable functionality.

Workarounds

Remove use of affected functionality from clients.

References

For more information

If you have any questions or comments about this advisory, please email us at security at matrix.org.

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "matrix-js-sdk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.11.0"
            },
            {
              "fixed": "34.8.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-47080"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-10-15T18:07:26Z",
    "nvd_published_at": "2024-10-15T15:15:12Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nIn matrix-js-sdk versions 9.11.0 through 34.7.0, the method `MatrixClient.sendSharedHistoryKeys` is vulnerable to interception by malicious homeservers.  The method implements functionality proposed in [MSC3061](https://github.com/matrix-org/matrix-spec-proposals/pull/3061) and can be used by clients to share historical message keys with newly invited users, granting them access to past messages in the room.\n\nHowever, it unconditionally sends these \"shared\" keys to all of the invited user\u0027s devices, regardless of whether the user\u0027s cryptographic identity is verified or whether the user\u0027s devices are signed by that identity. This allows the attacker to potentially inject its own devices to receive sensitive historical keys without proper security checks.\n\nNote that this only affects clients running the SDK with the legacy crypto stack. Clients using the new Rust cryptography stack (i.e. those that call `MatrixClient.initRustCrypto()` instead of `MatrixClient.initCrypto()`) are unaffected by this vulnerability, because `MatrixClient.sendSharedHistoryKeys()` raises an exception in such environments.\n\n### Patches\nFixed in matrix-js-sdk 34.8.0 by removing the vulnerable functionality.\n\n### Workarounds\nRemove use of affected functionality from clients.\n\n### References\n- [MSC3061](https://github.com/matrix-org/matrix-spec-proposals/pull/3061)\n\n### For more information\nIf you have any questions or comments about this advisory, please email us at [security at matrix.org](mailto:security@matrix.org).",
  "id": "GHSA-4jf8-g8wp-cx7c",
  "modified": "2024-10-15T18:07:26Z",
  "published": "2024-10-15T18:07:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-4jf8-g8wp-cx7c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47080"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3061"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-js-sdk/commit/2fb1e659c81f75253c047832dc9dcc2beddfac5f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/matrix-js-sdk"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Matrix JavaScript SDK\u0027s key history sharing could share keys to malicious devices"
}


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