The /etc/shadow file must not have an extended ACL.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-26441r2_rule The /etc/shadow file must not have an extended ACL.

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.

Check content

For Trusted Mode: Check the TCB auth files and directories. # ls -lLd /tcb /tcb/files /tcp/files/auth # ls -lL /tcb/files/auth/[a-z,A-Z]/* If the permissions of any of the /tcb files and directories include a “+”, this is a finding. For SMSE: Check the /etc/shadow file. # ls -lL /etc/shadow If the /etc/shadow file permissions include a “+”, the file has an extended ACL, this is a finding.

Fix text

For Trusted Mode: # chacl -z /tcb # chacl -z /tcb/files /tcb/files/auth # chacl -z /tcb/files/auth/[a-z]/* For SMSE: # chacl -z /etc/shadow

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.