Alarm raised over Adobe PDF zero-day vulnerability

Graham Cluley

If you are one of the world’s many users of Adobe’s Acrobat PDF Reader software then there’s good reason to prick up your ears and listen today, as details emerge of a critical zero-day vulnerability in the software that could allow hackers to run malicious code on computers.

According to a warning from the security response team at Adobe, a serious vulnerability in all currently supported versions of Adobe Reader and Acrobat ((Adobe Reader and Acrobat 9.1, 8.1.4, and 7.1.1 and earlier versions) are affected by the flaw.

The vulnerability, which is not limited to Windows users but also affects Mac and Unix users, means that Adobe users are being advised to disable JavaScript in Adobe Reader and Acrobat until a proper fix is available.

Adobe advises that JavaScript can be disabled by following these instructions:

1. Launch Acrobat or Adobe Reader.
2. Select Edit/Preferences
3. Select the JavaScript…

Read more in my article on the Naked Security website.

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Graham Cluley is a veteran of the anti-virus industry having worked for a number of security companies since the early 1990s when he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows. Now an independent security analyst, he regularly makes media appearances and is an international public speaker on the topic of computer security, hackers, and online privacy. Follow him on Twitter at @gcluley, or drop him an email.