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The alias file must not have an extended ACL.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22439 | GEN004390 | SV-26108r1_rule | ECLP-1 | Medium |
| Description |
|---|
| Excessive permissions on the aliases file may permit unauthorized modification. If the alias file is modified by an unauthorized user, they may modify the file to run malicious code or redirect email. |
| STIG | Date |
|---|---|
| UNIX SRG | 2013-03-26 |
Details
| Check Text ( C-27707r1_chk ) |
|---|
| Check the permissions of the /etc/mail/aliases file. # ls -lL /etc/mail/aliases If the permissions include a "+", the file has an extended ACL, this is a finding. |
| Fix Text (F-26287r1_fix) |
|---|
| Remove the extended ACL from the alias file. |