The remote host is missing an update to hztty announced via advisory DSA 385-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20385-1

Jens Steube reported a pair of buffer overflow vulnerabilities in hztty, a program to translate Chinese character encodings in a terminal session. These vulnerabilities could be exploited by a local attacker to gain root privileges on a system where hztty is installed. Additionally, hztty had been incorrectly installed setuid root, when it only requires the privileges of group utmp. This has also been corrected in this update. For the stable distribution (woody) this problem has been fixed in version 2.0-5.2woody1. For the unstable distribution (sid) this problem will befixed in version 2.0-6. We recommend that you update your hztty package.