Finding ID | Version | Rule ID | IA Controls | Severity |
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V-832 | GEN004380 | SV-40651r1_rule | ECLP-1 | Medium |
Description |
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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 |
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Solaris 10 SPARC Security Technical Implementation Guide | 2020-02-26 |
Check Text ( C-39390r1_chk ) |
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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 alias files have a mode more permissive than 0644, this is a finding. |
Fix Text (F-34508r1_fix) |
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Change the mode of the /etc/mail/aliases files (or equivalent, such as /usr/lib/aliases) to 0644. Procedure: # chmod 0644 /etc/mail/aliases /etc/mail/aliases.db |