IBM Informix Dynamic Server 10.UC3RC1 Trial for Linux and possibly other versions creates /tmp/installserver.txt with insecure permissions, which allows local users to append data to arbitrary files via a symlink attack.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29300
https://exchange.xforce.ibmcloud.com/vulnerabilities/29297
http://www.vupen.com/english/advisories/2006/3883
http://www.securityfocus.com/archive/1/447501/100/0/threaded