Apple Releases iOS 6.0.1, Serious Flaws in Kernel, Passcode Lock & WebKit Patched
Couple of moths ago we got iOS6, where Apple added over 200 new features, including Apple's own Maps app, Facebook integration, Siri improvements, Apple's new Passbook digital wallet app, and more. iOS 6 is compatible with the third-generation iPad, iPad 2, iPhone 4S, iPhone 4, iPhone 3GS, and fourth-generation iPod touch. With such tremendous features there also several security bugs have been spotted in the wild, which is affecting millions of iOS users across the globe. Among those bugs the most serious seems to be a kernel flaw discovered by researcher Mark Dowd of Azimuth Security and Eric Monti of Square that affects iPhone 3GS and later, as well iPod Touch and iPad2 and later. An attacker exploiting the vulnerability could essentially bypass address space randomization layout (ASLR) protections using a malicious application, and could determine addresses in the kernel, Apple’s advisory said. The researchers said the vulnerability, which could expose data to an attacker, occurs in the way iOS handles application programming interfaces in relation to kernel extensions.
Apple has released updates for iOS 6 which include security fixes. The iOS 6.0.1 update includes security fixes for the kernel, passcode locking and WebKit. The WebKit issues were also fixed in an update of the Safari web browser for Mac OS X. “Responses containing an OSBundleMachOHeaders key may have included kernel addresses, which may aid in bypassing address space layout randomization protection,” Apple said. “This issue was addressed by unsliding the addresses before returning them.”
A vulnerability in iOS’ Passcode Lock was also addressed in the latest update that could allow someone with access to the iOS device to access Passbook passes without entering a passcode. “A state management issue existed in the handling of Passbook passes at the lock screen. This issue was addressed through improved handling of Passbook passes,” Apple said. Finally, a pair of WebKit vulnerabilities were patched.
The first involved how iOS handled JavaScript arrays, and could allow an attacker to remotely execute code if a user visited a malicious site and was infected. Apple said it addressed the matter through additional validation of JavaScript arrays. The other WebKit flaw is a use-after-free issue in the handling of SVG images. Scalable vector graphics (SVG) are file formats for static or animated graphics. A user visiting a website hosting a malicious graphic could experience application crashes or worse, an attacker could remotely execute code.
The iOS 6.0.1 software update also includes fixes for the iPhone 5 to allow it to install over the air updates and to make it work better with WPA2 Wi-Fi networks. There are also corrections for bugs which flashed horizontal lines over the keyboard and stopped the camera flash going off. The two WebKit issues were also the only issues apparently fixed in the Safari 6.0.2 update. Safari 6.0.2 is available through Software Update for Mac OS X 10.7 Lion and the Mac App Store for Mac OS X 10.8 Mountain Lion.
-Source (Apple, threat post & The-H)
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