The problem itself isn't really an Apple problem,' said Maynor, a researcher at SecureWorks Inc., a network-monitoring company. 'This is a systemic problem across the industry.' [...] The MacBook used in the demonstration was not using the wireless gear that shipped with the computer. Instead, they used a third-party wireless card that they declined to name"
While not sharing the details of the exploit is understandable, if there is a risk easily avoided by watching what hardware you buy it would be nice of them to share. Regardless, it's still possible that Apple may decide to create a software workaround, if possible, since it is much easier to fix software than hardware.
Update: More information reveals that the flaw may lie within multiple types of wireless hardware, including Apple-branded hardware, rather than just any random card.