Mammoth security patch rushed out for Adobe Acrobat and Reader

Filed Under: Adobe, Malware, PDF, Vulnerability

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Adobe has issued a security bulletin urging users of its Adobe PDF Reader and Acrobat products to update their software before hackers take advantage of at least 23 vulnerabilities in the software.

In a clear sign of the seriousness posed by the security holes (at least one of which is being actively exploited by cybercriminals), the updates were issued ahead of Adobe's regular quarterly schedule.

Adobe Reader 9.3.4 (and earlier versions) for Windows, Mac OS X and UNIX, Adobe Acrobat 9.3.4 (and earlier versions) for Windows and Mac OS X, and Adobe Reader 8.2.4 (and earlier versions) and Adobe Acrobat 8.2.4 (and earlier versions) for Windows and Mac OS X are all vulnerable to the security flaws, which could potentially allow a hacker to take control of users' computers.

More information has been published by Adobe in their security advisory APSB10-21.

Earlier this year, Sophos blogger Chet Wisniewski interviewed Brad Arkin, Adobe's Senior Director of Product Security and Privacy, about the firm's security strategy and their upcoming sandboxing technology, designed to block the exploitation of previously unidentified security holes in its software.

You can also download the interview directly in MP3 format.

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About the author

Graham Cluley runs his own award-winning computer security blog at, and is a veteran of the anti-virus industry having worked for a number of security companies since the early 1990s. Now an independent security analyst, he regularly makes media appearances and gives computer security presentations. Follow him on Twitter at @gcluley