Buffer overflow in University of Washington c-client library (used by pine and other programs) allows remote attackers to execute arbitrary commands via a long X-Keywords header.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5223
http://www.securityfocus.com/bid/1687
http://www.securityfocus.com/bid/1646
http://archives.neohapsis.com/archives/freebsd/2000-09/0108.html
http://archives.neohapsis.com/archives/bugtraq/2000-08/0437.html
http://archives.neohapsis.com/archives/bugtraq/2000-08/0425.html