wireshark: Kafka dissector crash (CVE-2020-17498)

It may be possible to make Wireshark crash by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

Affected versions: 3.2.0 to 3.2.5

Fixed in version: 3.2.6

References:

• https://www.wireshark.org/security/wnpa-sec-2020-10.html
• https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=16672

Affected branches:

• master
• 3.12-stable