Title

The HYCU virtual appliance must audit the execution of privileged functions. (Cat II impact)

Discussion

Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat.

Check Content

Check the contents of the "/var/log/audit/audit.log" file. HYCU also maintains Event (Audit) information in the HYCU Web UI Events menu. Verify the audit log contains records showing when the execution of privileged functions occurred. If the audit log is not configured or does not have the required contents, this is a finding.

Fix Text

Configure HYCU to audit the execution of the "execve" system call. Add or update the following file system rules to "/etc/audit/rules.d/audit.rules": -a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -k execpriv -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -k execpriv -a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -k execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -k execpriv Reboot the appliance to take effect.

Additional Identifiers

Rule ID: SV-268226r1038378_rule

Vulnerability ID: V-268226

Group Title: SRG-APP-000343-NDM-000289

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.