Adobe has released a security update to address a flaw the company first warned users of in February.
The company said that the update should patch a flaw in Reader 9 and Acrobat 9 which could allow an attacker to use a specially-crafted PDF file to cause a crash and take control of a targeted system.
The security fix will update both the Mac and Windows versions of Adobe Reader and Acrobat to version 9.1. The company is planning to release fixes for the Unix version of the software as well as earlier versions of both applications later in the month.
Along with Adobe, security experts from the US Computer Emergency Response Team and Sans are recommending that users update to the 9.1 versions of the software if at all possible.
However, just days after Adobe released its advisory on the attacks and a timeline for a fix, an independent researcher constructed a home-made patch for Windows systems.