In Wireshark 2.4.0 and 2.2.0 to 2.2.8, the Profinet I/O dissector could crash with an out-of-bounds write. This was addressed in plugins/profinet/packet-dcerpc-pn-io.c by adding string validation.
https://www.wireshark.org/security/wnpa-sec-2017-39.html
https://www.debian.org/security/2017/dsa-4060
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13847