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/ucb /sbin /usr/sbin If the permissions include a "+", the file has an extended ACL, this is a finding.

Fix Text

Remove the extended ACL from the file. # getfacl [file with extended ACL] Remove each ACE returned. # setfacl -d [ACE] [file with extended ACL]

Additional Identifiers

Rule ID: SV-26364r1_rule

Vulnerability ID: V-22314

Group Title:

Expert Comments

CCIs tied to check.

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