The RADIUS parser in tcpdump before 4.9.2 has a buffer over-read in print-radius.c:print_attr_string().
https://support.apple.com/HT208221
https://security.gentoo.org/glsa/201709-23
https://github.com/the-tcpdump-group/tcpdump/commit/1bc78d795cd5cad5525498658f414a11ea0a7e9c
https://access.redhat.com/errata/RHEA-2018:0705
http://www.tcpdump.org/tcpdump-changes.txt