The remote Debian host is missing a security-related update.
Laurent Butti discovered a buffer underflow in the LANalyzer dissector of the Wireshark network traffic analyzer, which could lead to the execution of arbitrary code (CVE-2012-0068 ). This update also addresses several bugs, which can lead to crashes of Wireshark. These are not treated as security issues, but are fixed nonetheless if security updates are scheduled: CVE-2011-3483, CVE-2012-0041, CVE-2012-0042, CVE-2012-0066 and CVE-2012-0067.
Upgrade the wireshark packages. For the stable distribution (squeeze), this problem has been fixed in version 1.2.11-6+squeeze6.