CVE-2022-39203

2022-09-1319:15:13

CWE-269

[email protected]

web.nvd.nist.gov

matrix-appservice-irc

vulnerability

unauthorized access

nvd

node.js

irc bridge

security

patch

0.35.0

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

8.6 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.

Affected configurations

Vulners

NVD

Node

matrix-orgmatrix_appservice_ircRange<0.35.0

CPENameOperatorVersion
matrix:matrix_irc_bridgematrix matrix irc bridgelt0.35.0

CPE	Name	Operator	Version
matrix:matrix_irc_bridge	matrix matrix irc bridge	lt	0.35.0

CNA Affected

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