The audit system must be configured to audit all use of setuid programs.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-51141	OL6-00-000198	SV-65351r1_rule		Low

Description
Privileged programs are subject to escalation-of-privilege attacks, which attempt to subvert their normal role of providing some necessary but limited capability. As such, motivation exists to monitor these programs for unusual activity.

STIG	Date
Oracle Linux 6 Security Technical Implementation Guide	2014-06-12

Details

Check Text ( C-53545r1_chk )
To verify that auditing of privileged command use is configured, run the following command once for each local partition [PART] to find relevant setuid programs: # find [PART] -xdev -type f -perm -4000 -o -perm -2000 2>/dev/null Run the following command to verify entries in the audit rules for all programs found with the previous command: # grep [path] /etc/audit/audit.rules It should be the case that all relevant setuid programs have a line in the audit rules. If it is not the case, this is a finding.

Check Text ( C-53545r1_chk )

To verify that auditing of privileged command use is configured, run the following command once for each local partition [PART] to find relevant setuid programs:

# find [PART] -xdev -type f -perm -4000 -o -perm -2000 2>/dev/null

Run the following command to verify entries in the audit rules for all programs found with the previous command:

# grep [path] /etc/audit/audit.rules

It should be the case that all relevant setuid programs have a line in the audit rules.

If it is not the case, this is a finding.

Fix Text (F-55949r1_fix)
At a minimum, the audit system should collect the execution of privileged commands for all users and root. To find the relevant setuid programs run the following command for each local partition [PART]: # find [PART] -xdev -type f -perm -4000 -o -perm -2000 2>/dev/null Then, for each setuid program on the system, add a line of the following form to "/etc/audit/audit.rules", where [SETUID_PROG_PATH] is the full path to each setuid program in the list: -a always,exit -F path=[SETUID_PROG_PATH] -F perm=x -F auid>=500 -F auid!=4294967295 -k privileged

Fix Text (F-55949r1_fix)

At a minimum, the audit system should collect the execution of privileged commands for all users and root. To find the relevant setuid programs run the following command for each local partition [PART]:

# find [PART] -xdev -type f -perm -4000 -o -perm -2000 2>/dev/null

Then, for each setuid program on the system, add a line of the following form to "/etc/audit/audit.rules", where [SETUID_PROG_PATH] is the full path to each setuid program in the list:

-a always,exit -F path=[SETUID_PROG_PATH] -F perm=x -F auid>=500 -F auid!=4294967295 -k privileged