epan/dissectors/packet-h225.c in the H.225 dissector in Wireshark 2.x before 2.0.6 calls snprintf with one of its input buffers as the output buffer, which allows remote attackers to cause a denial of service (copy overlap and application crash) via a crafted packet.
https://www.wireshark.org/security/wnpa-sec-2016-51.html
https://code.wireshark.org/review/16852
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=12700