The SLES for vRealize audit system must be configured to audit user deletions of files and programs.

From VMware vRealize Operations Manager 6.x SLES Security Technical Implementation Guide

Part of SRG-OS-000474-GPOS-00219

Associated with: CCI-000172

SV-99393r1_rule The SLES for vRealize audit system must be configured to audit user deletions of files and programs.

Vulnerability discussion

Auditing file deletions will create an audit trail for files that are removed from the system. The audit trail could aid in system troubleshooting, as well as detecting malicious processes that attempt to delete log files to conceal their presence.

Check content

To determine if SLES for vRealize is configured to audit calls to the "unlink" system call, run the following command: # auditctl -l | grep syscall | grep unlink | grep -v unlinkat If the system is configured to audit this activity, it will return several lines. To determine if the system is configured to audit calls to the "unlinkat" system call, run the following command: # auditctl -l | grep syscall | grep unlinkat If the system is configured to audit this activity, it will return several lines. To determine if the system is configured to audit calls to the "rename" system call, run the following command: # auditctl -l | grep syscall | grep rename | grep -v renameat If the system is configured to audit this activity, it will return several lines. To determine if the system is configured to audit calls to the "renameat" system call, run the following command: # auditctl -l | grep syscall | grep renameat If the system is configured to audit this activity, it will return several lines. If no line is returned, this is a finding.

Fix text

Edit the audit.rules file and add the following line(s) to enable auditing of deletions of files and programs: -a always,exit -F arch=b64 -S unlink -S unlinkat -S rename -S renameat -F auid=0 -a always,exit -F arch=b64 -S unlink -S unlinkat -S rename -S renameat -F auid>=500 -F auid!=4294967295 -a always,exit -F arch=b32 -S unlink -S unlinkat -S rename -S renameat -F auid=0 -a always,exit -F arch=b32 -S unlink -S unlinkat -S rename -S renameat -F auid>=500 -F auid!=4294967295

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