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V-834

CAT II (Medium)

Files executed through a mail aliases file must have mode 0755 or less permissive.

Rule ID

SV-45853r2_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-000225

Discussion

If a file executed through a mail aliases file has permissions greater than 0755, it can be modified by an unauthorized user and may contain malicious code or instructions potentially compromising the system.

Check Content

If the “sendmail” package is not installed, this is not applicable.

Examine the contents of the /etc/aliases file.

Procedure:
# more /etc/aliases
Examine the aliases file for any utilized directories or paths.

# ls -lL <file referenced from aliases>
Check the permissions for any paths referenced. 
If any file referenced from the aliases file has a mode more permissive than 0755, this is a finding.

Fix Text

Use the chmod command to change the access permissions for files executed from the alias file. 
For example:
# chmod 0755 filename.