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ABCDKERNELPANIC: Unicode vs. Apple Inc.

Posted August 29, 2013    BeyondTrust Research Team

Yesterday, Russian researchers publicly disclosed the presence of a denial of service vulnerability affecting OS X 10.8 and iOS 6. OS X 10.9 Mavericks and iOS 7 are unaffected. So what’s the big deal with this particular denial of service vulnerability? It’s remotely exploitable and is trivial to trigger. Stringing together a series of Unicode characters, Arabic \u062E\u0337\u0334\u0310\u062E, and making a target display the characters triggers the vulnerability, causing applications to crash immediately.

Malicious Unicode

Malicious Unicode

Third party applications such as Chrome and Twitter (on both iOS and OS X), as well as iOS built-in applications like Messages, crash when displaying the above Unicode. Attackers may even create malicious SSIDs and broadcast them in public places. When a target user goes to join a WiFi network, turn on WiFi, or check their WiFi, the malicious SSID may be rendered by Core Text, a text and font layout and handling mechanism within OS X and iOS. The resulting segmentation fault in Core Text may cause instability in OS X, or even make an iOS device reboot.

Social media services have seen users posting, tweeting, and sharing the malicious Unicode string, prompting Facebook to ban the string from future posts. Having your Twitter feed blow up a Chrome tab isn’t the end of the world, but certainly worth mentioning as curious members of the public and script-kiddies everywhere will be having fun with this until a fix is released.

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You Change Your Oil Regularly; Why Not Your Passwords?

Posted September 11, 2014    Chris Burd

There are many things in life that get changed regularly:  your car oil, toothbrush and hopefully, your bed sheets.  It’s rare that you give these things much thought – even when you forget to change them. But what if you’re forgetting something that can cost you millions of dollars if left unchanged for long periods…

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On-Demand Webcast: The Little JPEG that Could (Hack Your Organization) with Marcus Murray

Posted September 10, 2014    Chris Burd

IT security has come a long way, but every once in a while you see something that makes you think otherwise. Every day, internal and external hackers breach and traverse “secure” environments, making you wonder just how easy it is for attackers to completely compromise your network. In a new on-demand BeyondTrust webcast, Marcus Murray,…

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Retina Vulnerability Audits – September 2014 Patch Tuesday

Posted September 9, 2014    BeyondTrust Research Team

The following is a list of Retina vulnerability audits for this September 2014 Patch Tuesday: MS14-052 – Cumulative Security Update for Internet Explorer (2977629) 35141 – Microsoft Cumulative Security Update for Internet Explorer (2977629) 35142 – Microsoft Cumulative Security Update for Internet Explorer (2977629) – IE8/2003 35143 – Microsoft Cumulative Security Update for Internet Explorer (2977629) – IE8…