Finding ID | Version | Rule ID | IA Controls | Severity |
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V-831 | GEN004360 | SV-37472r2_rule | ECLP-1 | Medium |
Description |
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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 |
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Red Hat Enterprise Linux 5 Security Technical Implementation Guide | 2015-03-12 |
Check Text ( C-36137r2_chk ) |
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If the "sendmail" and "postfix" packages are not installed, this is not applicable. 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, by default "/etc/postfix/aliases" # ls -lL # ls -lL If all the files are not owned by root, this is a finding. |
Fix Text (F-31384r1_fix) |
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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 /etc/postfix/aliases # chown root /etc/postfix/aliases.db |