Oracle 10g Database Server, when installed with a password that contains an exclamation point ("!") for the (1) DBSNMP or (2) SYSMAN user, generates an error that logs the password in the world-readable postDBCreation.log file, which could allow local users to obtain that password and use it against SYS or SYSTEM accounts, which may have been installed with the same password.
http://www.us-cert.gov/cas/techalerts/TA04-245A.html
http://www.oracle.com/technology/deploy/security/pdf/2004alert68.pdf
http://www.ngssoftware.com/advisories/oracle23122004D.txt
http://www.kb.cert.org/vuls/id/316206
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101782-1