About 1,500 iPhone and iPad apps contain an HTTPS-crippling vulnerability that makes it easy for attackers to intercept encrypted passwords, bank-account numbers, and other highly sensitive information, according to research released Monday.
An estimated two million people have installed the vulnerable apps, which include the Citrix OpenVoice Audio Conferencing, the Alibaba.com mobile app, Movies by Flixster with Rotten Tomatoes, KYBankAgent 3.0, and Revo Restaurant Point of Sale, according to analytics service SourceDNA. The weakness is the result of a bug in an older version of the AFNetworking, an open-source code library that allows developers to drop networking capabilities into their apps. Although AFNetworking maintainers fixed the flaw three weeks ago with the release of version 2.5.2, at least 1,500 iOS apps remain vulnerable because they still use version 2.5.1. That version became available in January and introduced the HTTPS-crippling flaw.
“The issue occurs even when the mobile application requests the library to apply checks for server validation in SSL certificates,” researchers Simone Bovi and Mauro Gentile wrote in a blog post published in late March. They went on to say that they analyzed one app running AFNetworking 2.5.1 and found alarming results. “We tested the app on a real device and, unexpectedly, we found that all the SSL traffic could be regularly intercepted through a proxy like Burp without any intervention!” (Emphasis is theirs.)
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