The "decode as" feature in packet-bssap.c in the SCCP dissector in Wireshark (formerly Ethereal) 0.99.6 through 0.99.8 allows remote attackers to cause a denial of service (application crash) via a malformed packet.

More... (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1563)