Adobe Reader and Acrobat fail to properly handle font data, which could allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.
A critical vulnerability exists in the font parsing code in Adobe Reader and Acrobat. The vulnerability results in memory corruption, which could allow for the execution of arbitrary code.
An attacker may use a specifically crafted PDF document to cause a crash or execute arbitrary code.
Apply an update
Adobe recommends all users upgrade to Adobe Reader and Acrobat 10.1, 9.4.5, or 8.3. APSB11-16 contains more details. Please also consider the following workarounds:
Use the Microsoft Enhanced Mitigation Experience Toolkit
Prevent Internet Explorer from automatically opening PDF documents
The installer for Adobe Reader and Acrobat configures Internet Explorer to automatically open PDF files without any user interaction. This behavior can be reverted to the safer option of prompting the user by importing the following as a .REG file:
Windows Registry Editor Version 5.00
Disable the displaying of PDF documents in the web browser
Preventing PDF documents from opening inside a web browser reduces attack surface. If this workaround is applied to updated versions of Adobe Reader and Acrobat, it may protect against future vulnerabilities.
To prevent PDF documents from automatically being opened in a web browser with Adobe Reader:
This vulnerability was reported by Will Dormann of the CERT/CC.
This document was written by Will Dormann.
|Date First Published:||2011-06-15|
|Date Last Updated:||2012-03-28 15:17 UTC|