The remote host is missing an update to lbreakout2 announced via advisory DSA 445-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20445-1

During an audit, Ulf Harnhammar discovered a vulnerability in lbreakout2, a game, where proper bounds checking was not performed on environment variables. This bug could be exploited by a local attacker to gain the privileges of group games. For the current stable distribution (woody) this problem has been fixed in version 2.2.2-1woody1. For the unstable distribution (sid), this problem will be fixed soon. We recommend that you update your lbreakout2 package.