Zero-Day Patch Released for Adobe Reader DC

Adobe have released an urgent update for Adobe Reader DC, patching newly discovered security vulnerabilities.

The highly popular PDF app, often pre-installed on Windows PCs, has been shown to contain a loophole that allows an attacker to remotely run Javascript code within an opened PDF to cause memory corruption.

Currently rated ‘Critical’ by Adobe’s Severity Rating System, the bug is believed to have originated from entirely legitimate functionality: Adobe Reader allows PDFs to contain embedded JavaScript to support interactions with the web.

Adobe have responded quickly – publishing the fix to Adobe Security Bulletin alongside patching for 42 other vulnerabilities as of Wednesday 12th February, including one which allowed PDF documents to access hashed passwords.

Adobe Reader is officially 25 years old this year, and although official figures are hard to source, is popularly believed to dominate more than 75% of the PDF software market.

Users can either auto-update their installation or prompt this manually by clicking ‘Help’ > ‘Check for Updates’ within the software itself.

 

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