The dissect_wccp2r1_address_table_info function in epan/dissectors/packet-wccp.c in the WCCP dissector in Wireshark 1.12.x before 1.12.7 does not prevent the conflicting use of a table for both IPv4 and IPv6 addresses, which allows remote attackers to cause a denial of service (application crash) via a crafted packet.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.