Apple Fixes iOS SSL Validation Flaw That Enables Man-in-the-Middle Attacks

Friday, February 21, 2014

Mike Lennon


(SecurityWeek) - Users of iOS devices will find themselves with a new software update to install, thanks to a certificate validation flaw (CVE-2014-1266) in the mobile popular OS.

The 35.4 MB update on an iPhone 5S, released by Apple on Friday, brings the latest version to iOS 7.0.6 and provides an SSL connection verification fix.

While Apple provides very little information when disclosing security issues, the company said that an attacker with a “privileged network position could capture or modify data in sessions protected by SSL/TLS."

SSL MiTM Attacks on iOS?According to Apple’s security notice, “Secure Transport failed to validate the authenticity of the connection.” Apple says it has addressed the issue by restoring the missing validation steps.

"While this flaw itself does not allow an attacker to compromise a vulnerable device, it is still a very serious threat to the privacy of users as it can be exploited through MitM (Man-in-the-Middle) [attacks]," Chaouki Bekrar, CEO and Head of Research at VUPEN, told SecurityWeek

For example, when connecting to an untrusted WiFi network, attackers could spy on user connections to websites and services that are supposed to be using encrypted communications, Bekrar said.

Users should update their iOS devices as soon as possible, he added.

The update is available for Available for iPhone 4 and later, iPod touch (5th generation), iPad 2 and later.

To get the latest iOS update, from your iOS device go to Settings >> General >> Software Update, and then tap on "Download and Install". 

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CVE Vulnerabilities
Apple SSL iOS vulnerability CVE-2014-1266
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Ray Pesek ImperialViolet did their usual great job analyzing the flaw:

Looks like it could have been caused as simply as someone accidentally pasting in the same line twice in a row.
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