Most likely nothing. You probably aren't running a web server that shells out to do CGI or something else. Macs don't use shell to do their network config. Thos

Most likely nothing. You probably aren't running a web server that shells out to do CGI or something else. Macs don't use shell to do their network config. Those are the 2 biggies in the Linux world right now. Basically to be vulnerable requires 2 components: 1. You have to be able to get some remote user specified stuff into a environment variable. 2. You have to invoke /bin/sh (calls to system(3)[1] do this, as well as actual shell scripts). If you just have a non-server mac, there's no huge rush--no one has identified an actual stock service/daemon that is susceptible to the vulnerability. [1] "man 3 system"