Unspecified vulnerability in dop in HP Tru64 UNIX 5.1B-4, 5.1B-3, and 5.1A PK6 allows local users to gain privileges via a large amount of data in the environment, as demonstrated by a long environment variable.
https://www2.itrc.hp.com/service/cki/docDisplay.do?docId=c01036871
https://exchange.xforce.ibmcloud.com/vulnerabilities/34175
http://www.vupen.com/english/advisories/2007/1715
http://www.securitytracker.com/id?1018021
http://www.securityfocus.com/archive/1/468103/100/0/threaded
http://www.orkaan.org/tru64/orkaan_-_exp_Tru64-5.X_SSRT071326.html