IRC mode parameter confusion in matrix-appservice-irc
CVE-2022-39202

4.3MEDIUM

Key Information:

Vendor

Matrix-org

Status
Matrix-appservice-irc
Vendor
CVE Published:
13 September 2022

What is CVE-2022-39202?

matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. The Internet Relay Chat (IRC) protocol allows you to specify multiple modes in a single mode command. Due to a bug in the underlying matrix-org/node-irc library, affected versions of matrix-appservice-irc perform parsing of such modes incorrectly, potentially resulting in the wrong user being given permissions. Mode commands can only be executed by privileged users, so this can only be abused if an operator is tricked into running the command on behalf of an attacker. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround users should refrain from entering mode commands suggested by untrusted users. Avoid using multiple modes in a single command.

Affected Version(s)

matrix-appservice-irc < 0.35.0

References

https://github.com/matrix-org/matrix-appservice-irc/secur...
x_refsource_CONFIRM
https://github.com/matrix-org/matrix-appservice-irc/commi...
x_refsource_MISC
https://matrix.org/blog/2022/09/13/security-release-of-ma...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.