The Mobile Identity parser in (1) epan/dissectors/packet-ansi_a.c in the ANSI A dissector and (2) epan/dissectors/packet-gsm_a_common.c in the GSM A dissector in Wireshark 1.12.x before 1.12.9 and 2.0.x before 2.0.1 improperly uses the tvb_bcd_dig_to_wmem_packet_str function, which allows remote attackers to cause a denial of service (buffer overflow and 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.