In Wireshark 2.2.0 to 2.2.6 and 2.0.0 to 2.0.12, the DHCP dissector could read past the end of a buffer. This was addressed in epan/dissectors/packet-bootp.c by extracting the Vendor Class Identifier more carefully.
www.securityfocus.com/bid/98808
www.securitytracker.com/id/1038612
bugs.chromium.org/p/oss-fuzz/issues/detail?id=1153
bugs.chromium.org/p/oss-fuzz/issues/detail?id=1183
bugs.wireshark.org/bugzilla/show_bug.cgi?id=13609
bugs.wireshark.org/bugzilla/show_bug.cgi?id=13628
code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=a6e033c14da13bd5f72dfe07a347586517639d12
www.wireshark.org/security/wnpa-sec-2017-24.html