System log files must have mode 0640 or less permissive.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECTP-1

Associated with: CCI-001314

SV-787r2_rule System log files must have mode 0640 or less permissive.

Vulnerability discussion

If the system log files are not protected, unauthorized users could change the logged data, eliminating its forensic value.

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Change the mode of the system log file(s) to 0640 or less permissive. Procedure: # chmod "0640" /path/to/system-log-file NOTE: Do not confuse system log files with audit logs. Any subsystems that require less stringent permissions must be documented.

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