Common Unix/Linux vulnerabilities
Native Unix and Linux operating systems share many of the same security vulnerabilities. For example, both operating systems don't allow delegation of administrative privileges - particularly tasks that require root-level authority. As a result, many companies find that too many users have more authority than they need while also sharing the root password.
Also, both Unix and Linux provide limited logging capabilities by capturing system activity through syslog. However, security information captured in syslog is limiting and may not meet regulatory requirements such as those established by the Health Insurance Portability and Accountability Act or the Gramm-Leach-Bliley Act, nor will it help in troubleshooting and forensics.