The remote host is missing an update to xtokkaetama announced via advisory DSA 367-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20367-1

Another buffer overflow was discovered in xtokkaetama, involving the '-nickname' command line option. 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 1.0b-6woody2. For the unstable distribution (sid) this problem is fixed in version 1.0b-9. We recommend that you update your xtokkaetama package.