Buffer overflow in HP Tru64 UNIX 5.1a, 5.1, 5.0a, 4.0g, and 4.0f allows attackers to execute arbitrary code via a long _XKB_CHARSET environment variable to (1) dxpause, (2) dxconsole, or (3) dtsession.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10016
https://euvd.enisa.europa.eu/vulnerability/EUVD-2002-1586
http://www.securityfocus.com/archive/1/290115
http://www.blacksheepnetworks.com/security/hack/tru64/TRU64_xkb.txt
http://wwss1pro.compaq.com/support/reference_library/viewdocument.asp?source=SRB0039W.xml&dt=11
http://archives.neohapsis.com/archives/fulldisclosure/2002-q3/1203.html