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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-26686r1_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 e-mail. |
| STIG | Date |
|---|---|
| Solaris 9 X86 Security Technical Implementation Guide | 2013-07-02 |
Details
| Check Text ( C-39386r1_chk ) |
|---|
| Find the alias files on the system. Procedure: # egrep '^O(A| AliasFile)' /etc/mail/sendmail.cf If the "alias file" is an NIS or LDAP map, this check is not applicable. The default location is /etc/mail/aliases. Check the permissions of the alias file and the hashed version of it used by sendmail. Procedure: # ls -lL /etc/mail/aliases /etc/mail/aliases.db If the permissions include a "+", the file has an extended ACL and this is a finding. |
| Fix Text (F-23927r1_fix) |
|---|
| Remove the extended ACL from the files. # getfacl /etc/mail/aliases /etc/mail/aliases.db Remove each ACE from the files. # setfacl -d [ACE] /etc/mail/aliases /etc/mail/aliases.db |