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V-239477

CAT II (Medium)

The SLES for vRealize must generate audit records when successful/unsuccessful attempts to access privileges occur. The operating system must generate audit records for all discretionary access control permission modifications using chmod.

Rule ID

SV-239477r661882_rule

STIG

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

Version

V2R2

CCIs

CCI-000172

Discussion

Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter).

Check Content

To determine if the system is configured to audit calls to the "chmod" system call, run the following command: 

# auditctl -l | grep syscall | grep chmod

If the system is configured to audit this activity, it will return several lines, such as: 

LIST_RULES: exit,always arch=3221225534 (0xc000003e) auid=0 syscall=chmod,fchmod,chown,fchown,fchownat,fchmodat
LIST_RULES: exit,always arch=3221225534 (0xc000003e) auid>=500 (0x1f4) auid!=-1 (0xffffffff) syscall=chmod,fchmod,chown,fchown,fchownat,fchmodat

If no lines are returned, this is a finding.

Fix Text

At a minimum, the audit system should collect file permission changes for all users and root. Add the following to "/etc/audit/audit.rules": 

-a always,exit -F arch=b64 -S chmod -F auid=0
-a always,exit -F arch=b64 -S chmod -F auid>=500 -F auid!=4294967295

Or run the following command to implement all logging requirements:

# /etc/dodscript.sh