The remote host is missing an update to ethereal announced via advisory DSA 511-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20511-1

Several buffer overflow vulnerabilities were discovered in ethereal, a network traffic analyzer. These vulnerabilites are described in the ethereal advisory enpa-sa-00013. Of these, only some parts of CVE-2004-0176 affect the version of ethereal in Debian woody. CVE-2004-0367 and CVE-2004-0365 are not applicable to this version. For the current stable distribution (woody), these problems have been fixed in version 0.9.4-1woody7. For the unstable distribution (sid), these problems have been fixed in version 0.10.3-1. We recommend that you update your ethereal package.