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The alias file must be owned by root.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-831 | GEN004360 | SV-45827r1_rule | Medium |
| Description |
|---|
| If the alias file is not owned by root, an unauthorized user may modify the file adding aliases to run malicious code or redirect e-mail. |
| STIG | Date |
|---|---|
| SUSE Linux Enterprise Server v11 for System z | 2017-08-25 |
Details
| Check Text ( C-43144r1_chk ) |
|---|
| Check the ownership of the alias files. Procedure: for sendmail: # ls -lL /etc/aliases # ls -lL /etc/aliases.db If all the files are not 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. # ls -lL # ls -lL If all the files are not owned by root, this is a finding. |
| Fix Text (F-39214r1_fix) |
|---|
| Change the owner of the /etc/aliases file to root. Procedure: for sendmail: # chown root /etc/aliases # chown root /etc/aliases.db for postfix # chown root # chown root |