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Developer Warns Against Using In-App Browsers on iOS Due to Potential for Keylogging
This means an unscrupulous developer could potentially create an app with an in-app browser to capture the usernames and passwords of users who login to websites like Twitter or Facebook with the browser. Many existing apps use in-app browsers to allow users to do things like login with an already existing social media account simply to make the login process easier, but it appears there's also potential for abuse.
A few things to note about what you're seeing:Hockenberry says that acquiring usernames and passwords works in both iOS 7 and iOS 8, and may also work in earlier versions of iOS, but he is quick to point out that it is not a bug, as the techniques demonstrated in the video can be used for "good as well as evil."
The information at the top of the screen is generated by the app, not the web page. This information could easily be uploaded to remote server.
This is not phishing: the site shown is the actual Twitter website. This technique can be applied to any site that has a input form. All the attacker needs to know can easily be obtained by viewing the public facing HTML on the site.
Hockenberry does not have a clear solution in mind for Apple, as fixing the core behavior of both WebKit and UIWebView would require the company to update every version of iOS that included Safari and WebKit, but he does suggest the company could protect users with OAuth.
As for end users, Hockenberry warns not to enter private information when using an app that's not Safari. Browsing web content is safe, but he recommends that users open a link in Safari if there are any concerns about private information. More details on the security of in-app browsers, OAuth, and Hockenberry's recommendations can be found in his original blog post.