matrix-appservice-irc provides an IRC bridge for Matrix. The vulnerability in node-irc allows an attacker to manipulate a Matrix user into executing IRC commands by having them reply to a maliciously crafted message. The vulnerability has been patched in matrix-appservice-irc 0.33.2. In terms of a workaround, users should refrain from replying to messages from untrusted participants in IRC-bridged Matrix rooms.
References
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-37hr-348p-rmf4
- https://github.com/matrix-org/node-irc/security/advisories/GHSA-52rh-5rpj-c3w6
- https://nvd.nist.gov/vuln/detail/CVE-2022-29166
- https://matrix.org/blog/2022/05/04/0-34-0-security-release-for-matrix-appservice-irc-high-severity
- https://github.com/advisories/GHSA-37hr-348p-rmf4