The remote host is missing an update to canna announced via advisory DSA 224-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20224-1

Several vulnerabilities have been discovered in canna, a Japanese input system. The Common Vulnerabilities and Exposures (CVE) project identified the following vulnerabilities: * CVE-2002-1158 (BugTraq Id 6351): hsj of Shadow Penguin Security discovered a heap overflow vulnerability in the irw_through function in canna server. * CVE-2002-1159 (BugTraq Id 6354): Shinra Aida of the Canna project discovered that canna does not properly validate requests, which allows remote attackers to cause a denial of service or information leak. For the current stable distribution (woody) these problems have been fixed in version 3.5b2-46.2. For the old stable distribution (potato) these problems have been fixed in version 3.5b2-25.2. For the unstable distribution (sid) these problems have been fixed in version 3.6p1-1. We recommend that you upgrade your canna packages.