The PHP vulnerabilities (yes there is more than one) are relatively easy to exploit if you can fiddle with what requests your server receives (easy).

The DNS exploit requires someone to figure out how to man-in-the-middle your connection. While that is trivial for governments, it is much less likely to be done by purely bad actors, simply for how visible the problem is.

Both are big problems, but only one of them is continually exploitable, as the DNS issues have been largely resolved even before the very public disclosure.