The BOOTP parser in tcpdump before 4.9.2 has a buffer over-read in print-bootp.c:bootp_print().
www.debian.org/security/2017/dsa-3971
www.securitytracker.com/id/1039307
www.tcpdump.org/tcpdump-changes.txt
access.redhat.com/errata/RHEA-2018:0705
github.com/the-tcpdump-group/tcpdump/commit/29e5470e6ab84badbc31f4532bb7554a796d9d52
github.com/the-tcpdump-group/tcpdump/commit/66e22961b30547e9a8daa1f0e8dc9fbe6e2698fa
security.gentoo.org/glsa/201709-23
support.apple.com/HT208221