Skip to content

IRC mode parameter confusion in matrix-org/node-irc

Low
dkasak published GHSA-cq7q-5c67-w39w Sep 13, 2022

Package

npm matrix-appservice-irc (npm)

Affected versions

<0.35.0

Patched versions

0.35.0

Description

Impact

IRC 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.

Patches

The vulnerability has been patched in matrix-appservice-irc 0.35.0.

Workarounds

Refrain from entering mode commands suggested by untrusted users. Avoid using multiple modes in a single command.

References

Credits

Discovered and reported by Val Lorentz.

For more information

If you have any questions or comments about this advisory email us at security@matrix.org.

Severity

Low

CVE ID

CVE-2022-39202

Weaknesses