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All system command files must not have extended ACLs.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22314 GEN001210 SV-64479r1_rule Medium
Description
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.
STIG Date
Oracle Linux 5 Security Technical Implementation Guide 2020-02-25

Details

Check Text ( C-52897r1_chk )
Check 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. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.
Fix Text (F-55075r1_fix)
Remove the extended ACL from the file.
# setfacl --remove-all [file with extended ACL]