CVE-2024-42369 A room with itself as a its predecessor will freeze matrix-js-sdk

2024-08-2014:37:19

CWE-674

GitHub_M

www.cve.org

cve-2024-42369

matrix-js-sdk

malicious homeserver

CVSS3

4.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:L

EPSS

0.001

Percentile

17.7%

JSON

matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. A malicious homeserver can craft a room or room structure such that the predecessors form a cycle. The matrix-js-sdk’s getRoomUpgradeHistory function will infinitely recurse in this case, causing the code to hang. This method is public but also called by the ‘leaveRoomChain()’ method, so leaving a room will also trigger the bug. This was patched in matrix-js-sdk 34.3.1.

CNA Affected

[
  {
    "vendor": "matrix-org",
    "product": "matrix-js-sdk",
    "versions": [
      {
        "version": "< 34.3.1",
        "status": "affected"
      }
    ]
  }
]