The system package management tool must verify contents of all files associated with the audit package.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-38637	RHEL-06-000281	SV-50438r2_rule		Medium

Description
The hash on important files like audit system executables should match the information given by the RPM database. Audit executables with erroneous hashes could be a sign of nefarious activity on the system.

STIG	Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide	2017-12-08

Details

Check Text ( C-46196r3_chk )
The following command will list which audit files on the system have file hashes different from what is expected by the RPM database. # rpm -V audit \| awk '$1 ~ /..5/ && $2 != "c"' If there is output, this is a finding.

Fix Text (F-43586r1_fix)
The RPM package management system can check the hashes of audit system package files. Run the following command to list which audit files on the system have hashes that differ from what is expected by the RPM database: # rpm -V audit \| grep '^..5' A "c" in the second column indicates that a file is a configuration file, which may appropriately be expected to change. If the file that has changed was not expected to then refresh from distribution media or online repositories. rpm -Uvh [affected_package] OR yum reinstall [affected_package]

Fix Text (F-43586r1_fix)

The RPM package management system can check the hashes of audit system package files. Run the following command to list which audit files on the system have hashes that differ from what is expected by the RPM database:

# rpm -V audit | grep '^..5'

A "c" in the second column indicates that a file is a configuration file, which may appropriately be expected to change. If the file that has changed was not expected to then refresh from distribution media or online repositories.

rpm -Uvh [affected_package]

OR

yum reinstall [affected_package]