The remote host is missing an update to cgiirc announced via advisory DSA 1052-1. Several buffer overflows have been discovered in cgiirc, a web-based IRC client, which could be exploited to execute arbitrary code. The old stable distribution (woody) does not contain cgiirc packages.
For the stable distribution (sarge) these problems have been fixed in version 0.5.4-6sarge1. For the unstable distribution (sid) these problems have been fixed in version 0.5.4-6sarge1. We recommend that you upgrade your cgiirc package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201052-1