Lessons for Facebook

  • Stop the charade. Nearly all instances of user information and content are essentially public. Many users have an understanding of privacy and control not reflected by the findings of this series and others. Either take necessary action to address these issues, or drop illusory privacy controls.

  • Talk to developers. Several resources exist for helping developers get started on the Platform, but Facebook has published much less content reminding developers of security precautions. If you associate your brand with third-party code, you have a reponsibility to help ensure the safety of that code.

  • Truly verify applications. The current Verified Applications program apparently does not address basic security flaws. Also, while opening the floodgates to any application has benefits, it also poses serious risks that may justify putting a few limits or checks in place.

  • Limit application access. While it’s encouraging to hear that Facebook will be adding granular access controls in response to the Canadian Privacy Commissioner, it’s disheartening that such steps took so long and are still nearly a year off from full implementation.

  • Take clickjacking seriously. This series has only begun to demonstrate the implications of clickjacking. Single-click authorization of applications, even when one exempts from the Platform, only adds to the danger of clickjacking on Facebook pages.

  • Improve request verification. The Facebook JavaScript API may provide much useful functionality, but it also opens the door to simple API requests with merely a session secret. Other means exist for ensuring that requests come legitimately from an application instead of an attacker.

  • Distinguish your brand. With the current Facebook Platform, any vulnerability in a third-party application becomes a vulnerability for Facebook. Either users should be able to trust applications to the same degree as Facebook, or Facebook should more clearly distinguish third-party content.

  • Educate your users. People click applications without a second thought to the risks of rogue applications or possible security problems. Users may seek to share personal information with friends, but fail to realize how that information is used by third-party code.
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