Extra long export lists over 256 characters in some mount daemons allows NFS directories to be mounted by anyone.
https://vuls.cert.org/confluence/pages/viewpage.action?pageId=97124527
https://vuls.cert.org/confluence/pages/viewpage.action?pageId=97124517
https://vuls.cert.org/confluence/pages/viewpage.action?pageId=96665790