The remote host is missing an update to xconq announced via advisory DSA 354-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20354-1

Steve Kemp discovered a buffer overflow in xconq, in processing the USER environment variable. In the process of fixing this bug, a similar problem was discovered with the DISPLAY environment variable. This vulnerability could be exploited by a local attacker to gain gid 'games'. For the current stable distribution (woody) this problem has been fixed in version 7.4.1-2woody2. For the unstable distribution (sid) this problem will be fixed soon. Refer to Debian bug #202963. We recommend that you update your xconq package.