CVE-2022-39203 Parsing issue in matrix-org/node-irc leading to room takeovers

2022-09-1318:15:12

CWE-269

GitHub_M

www.cve.org

cve-2022-39203

parsing issue

matrix-org/node-irc

room takeovers

node.js

irc bridge

vulnerability

patched

workaround

operators

dynamic channel joining

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

8.8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

42.9%

JSON

matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Attackers can specify a specific string of characters, which would confuse the bridge into combining an attacker-owned channel and an existing channel, allowing them to grant themselves permissions in the channel. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround operators may disable dynamic channel joining via dynamicChannels.enabled to prevent users from joining new channels, which prevents any new channels being bridged outside of what is already bridged, and what is specified in the config.

CNA Affected

[
  {
    "product": "matrix-appservice-irc",
    "vendor": "matrix-org",
    "versions": [
      {
        "status": "affected",
        "version": "< 0.35.0"
      }
    ]
  }
]