Title

All system command files must not have extended ACLs. (Cat II impact)

Discussion

Restricting permissions will protect system command files from unauthorized modification. System command files include files present in directories used by the operating system for storing default system executables and files present in directories included in the system's default executable search paths.

Check Content

Verify all system command files have no extended ACLs. # ls -lL /etc /bin /usr/bin /usr/lbin /usr/usb /sbin /usr/sbin If the permissions include a "+", the file has an extended ACL, this is a finding.

Fix Text

Remove the optional ACL from the file. # chacl -z <path>/<file-with-extended-ACL>

Additional Identifiers

Rule ID: SV-38281r1_rule

Vulnerability ID: V-22314

Group Title: GEN001210

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.