As part of one of our recent research projects, we evaluated how malicious thid-party apps could affect user privacy, despite the various security controls and the solid security architecture of the iOS platform. Therefore, we reviewed the iOS app sandbox model for weaknesses – and, indeed, made some finds.
more here.............http://www.andreas-kurtz.de/2014/09/malicious-apps-ios8.html
more here.............http://www.andreas-kurtz.de/2014/09/malicious-apps-ios8.html