The remote host is missing an update to ethereal announced via advisory DSA 718-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20718-1

A buffer overflow has been detected in the IAPP dissector of Ethereal, a commonly used network traffic analyser. A remote attacker may be able to overflow a buffer using a specially crafted packet. More problems have been discovered which don't apply to the version in woody but are fixed in sid as well. For the stable distribution (woody) this problem has been fixed in version 0.9.4-1woody12. For the unstable distribution (sid) these problems have been fixed in version 0.10.10-1. We recommend that you upgrade your ethereal packages.