Description
The labeled-response module in UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 "label" message tag when echoing it into replies, which allows any user on a network with two or more linked servers to inject server-to-server commands that are executed with server authority.
OhShit! incidents
References
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.