Check: GEN004370
SUSE Linux Enterprise Server v11 for System z STIG:
GEN004370
(in versions v1 r12 through v1 r9)
Title
The aliases file must be group-owned by root, sys, bin, or system. (Cat II impact)
Discussion
If the alias file is not group-owned by root or a system group, an unauthorized user may modify the file adding aliases to run malicious code or redirect e-mail.
Check Content
If the “sendmail” or “postfix” packages are not installed, this is not applicable. Check the group ownership of the alias files. Procedure: for sendmail: # ls -lL /etc/aliases If the file is not group-owned by root, this is a finding. # ls -lL /etc/aliases.db If the file is not group-owned by root, this is a finding. for postfix: Verify the location of the alias file. # postconf alias_maps This will return the location of the "aliases" file, by default "/etc/aliases". # ls -lL <postfix aliases file> If the file is not group-owned by root, this is a finding. # ls -lL <postfix aliases.db file> If the file is not group-owned by root, this is a finding.
Fix Text
Change the group-owner of the /etc/aliases file. Procedure: for sendmail: # chgrp root /etc/aliases # chgrp root /etc/aliases.db for postfix # chgrp root <postfix aliases file> # chgrp root <postfix aliases.db file>
Additional Identifiers
Rule ID: SV-45848r2_rule
Vulnerability ID: V-22438
Group Title: GEN004370
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000225 |
The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions. |
Controls
| Number | Title |
|---|---|
| AC-6 |
Least Privilege |