Thanks for clarifying: I was able to find the vulnerability on the unpatched system with: $ ls -al / (etc) -rw-r--r-- 1 root wheel 0 Aug 6 06:4

Thanks for clarifying: I was able to find the vulnerability on the unpatched system with: $ ls -al / (etc) -rw-r--r-- 1 root wheel 0 Aug 6 06:46 this_system_is_vulnerable So I can a) confirm the vulnerability exists and it can write with root privileges. and b) the patch works: I ran the patch, deleted the test file, rebooted and the file is no longer able to be written.