Utempter allows device names that contain .. (dot dot) directory traversal sequences, which allows local users to overwrite arbitrary files via a symlink attack on device names in combination with an application that trusts the utmp or wtmp files.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A979
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10115
https://exchange.xforce.ibmcloud.com/vulnerabilities/15904
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2004&m=slackware-security.404389
http://www.redhat.com/support/errata/RHSA-2004-175.html
http://www.redhat.com/support/errata/RHSA-2004-174.html
http://www.mandriva.com/security/advisories?name=MDKSA-2004:031
http://sunsolve.sun.com/search/document.do?assetkey=1-77-1000752.1-1