Finding ID | Version | Rule ID | IA Controls | Severity |
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V-22438 | GEN004370 | SV-45848r2_rule | Medium |
Description |
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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. |
STIG | Date |
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SUSE Linux Enterprise Server v11 for System z | 2016-12-20 |
Check Text ( C-43146r2_chk ) |
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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 If the file is not group-owned by root, this is a finding. # ls -lL If the file is not group-owned by root, this is a finding. |
Fix Text (F-39232r2_fix) |
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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 # chgrp root |