The /etc/shadow (or equivalent) file must have mode 0400.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with: CCI-000225

SV-38470r2_rule The /etc/shadow (or equivalent) file must have mode 0400.

Vulnerability discussion

The /etc/shadow file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification. The file also contains password hashes which must not be accessible to users other than root. The Trusted Mode /tcb tree requires modes more permissive than the shadow file.

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Fix text

For Trusted Mode: # chmod 0555 /tcb # chmod 0771 /tcb/files /tcb/files/auth # chmod 0664 /tcb/files/auth/[a-z]/* For SMSE: # chmod 0400 /etc/shadow

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