The system must not use .forward files.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4385	GEN004580	SV-37506r3_rule		Medium

Description
The .forward file allows users to automatically forward mail to another system. Use of .forward files could allow the unauthorized forwarding of mail and could potentially create mail loops which could degrade system performance.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2016-07-22

Details

Check Text ( None )
None

Fix Text (F-31416r3_fix)
Disable forwarding for sendmail and remove .forward files from the system Procedure: Edit the /etc/mail/sendmail.mc file to change the ForwardPath entry to a null path by adding the line define(`confFORWARD_PATH',`') rebuild the sendmail.cf file. If the /etc/mail/sendmail.mc file does not exist, the sendmail.cf file should be updated directly. Remove all .forward files on the system # find / -name .forward -delete

Fix Text (F-31416r3_fix)

Disable forwarding for sendmail and remove .forward files from the system

Procedure:
Edit the /etc/mail/sendmail.mc file to change the ForwardPath entry to a null path by adding the line
define(`confFORWARD_PATH',`')
rebuild the sendmail.cf file.
If the /etc/mail/sendmail.mc file does not exist, the sendmail.cf file should be updated directly.

Remove all .forward files on the system
# find / -name .forward -delete