Buffer overflow in the ppp_hdlc function in print-ppp.c in tcpdump 4.6.2 and earlier allows remote attackers to cause a denial of service (crash) cia a crafted PPP packet.
https://support.apple.com/kb/HT205031
http://www.ubuntu.com/usn/USN-2433-1
http://www.securityfocus.com/bid/71468
http://www.securityfocus.com/archive/1/534829/100/0/threaded
http://www.mandriva.com/security/advisories?name=MDVSA-2015:125
http://www.mandriva.com/security/advisories?name=MDVSA-2014:240
http://www.debian.org/security/2015/dsa-3193
http://www.debian.org/security/2014/dsa-3086
http://seclists.org/tcpdump/2014/q4/72
http://packetstormsecurity.com/files/130730/tcpdump-Denial-Of-Service-Code-Execution.html
http://lists.opensuse.org/opensuse-updates/2015-03/msg00084.html
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html