CVE-2022-39203

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw	Mitigation Third Party Advisory
https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity/	Vendor Advisory
https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw	Mitigation Third Party Advisory
https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity/	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:matrix:matrix_irc_bridge:*:*:*:*:*:node.js:*:*

History

21 Nov 2024, 07:17

Type	Values Removed	Values Added
References	~~() https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw - Mitigation, Third Party Advisory~~	() https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw - Mitigation, Third Party Advisory
References	~~() https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity/ - Vendor Advisory~~	() https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity/ - Vendor Advisory

Information

Published : 2022-09-13 19:15

Updated : 2024-11-21 07:17

NVD link : CVE-2022-39203

Mitre link : CVE-2022-39203

CVE.ORG link : CVE-2022-39203

JSON object : View

Products Affected

matrix

matrix_irc_bridge

CWE

CWE-269

Improper Privilege Management

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