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UNIX passwords on Oracle servers - encrypted passwords user IDs
Oracle Tips by Burleson Consulting

UNIX passwords on Oracle servers

UNIX passwords are notoriously vulnerable to hacking. In UNIX, users can change their passwords by invoking the passwd command. Note that the listing of /etc/passwd above does not contain the encrypted passwords for the user IDs, and the password column is denoted with an x. This indicates that the system administrator is storing the passwords in another special file called /etc/shadow.

Unfortunately, protecting passwords in a /etc/shadow file is not always enough to ensure security. Several tools such as John the Ripper can be used to easily crack into these UNIX files, stealing access to the Oracle server, and all database data. To learn how to protect yourself from UNIX password hacking, see the UNIX password cracker at http://www.openwall.com/john/.


The above is an excerpt from the "Oracle9i UNIX Administration Handbook" by Oracle press, authored by Donald K. Burleson.

 

 

 

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