Wireshark is a program for monitoring network traffic.
Several denial of service bugs were found in Wireshark's HTTP, iSeries, DCP ETSI, SSL, MMS, DHCP and BOOTP protocol dissectors. It was possible for Wireshark to crash or stop responding if it read a malformed packet off the network. (CVE-2007-3389, CVE-2007-3390, CVE-2007-3391, CVE-2007-3392, CVE-2007-3393)
Users of Wireshark and Ethereal should upgrade to these updated packages, containing Wireshark version 0.99.6, which is not vulnerable to these issues.