The remote host is missing an update to wireshark announced via advisory DSA 2324-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202324-1

The Microsoft Vulnerability Research group discovered that insecure load path handling could lead to execution of arbitrary Lua script code. For the oldstable distribution (lenny), this problem has been fixed in version 1.0.2-3+lenny15. This build will be released shortly. For the stable distribution (squeeze), this problem has been fixed in version 1.2.11-6+squeeze4. For the unstable distribution (sid), this problem has been fixed in version 1.6.2-1. We recommend that you upgrade your wireshark packages.