Security Corner

Jun 23 2009   5:45PM GMT

Foxit Reader Contains Multiple Vulnerabilities

Ken Harthun Ken Harthun Profile: Ken Harthun

According to a U.S. Cert bulletin issued today, my favorite PDF reader, Foxit Reader has multiple security vulnerabilities:

Foxit Reader has released updates for multiple vulnerabilities. By convincing a user to open a malicious PDF file, an attacker may be able to execute code or cause a vulnerable PDF viewer to crash. The PDF could be emailed as an attachment or hosted on a website.US-CERT encourages users to review the Foxit Security Bulletin and Vulnerability Note VU#251793 and apply any necessary updates.

The Foxit Security Bulletin describes the issues:

Two Security Vulnerabilities Fixed in Foxit Reader 3.0 and JPEG2000/JBIG2 Decoder

Here is detailed information about the vulnerabilities:

1. Fixed a problem related to negative stream offset (in malicious JPEG2000 stream) which caused reading data from an out-of-bound address. We have added guard codes to solve this issue.
2. Fixed a problem related to error handling when decoding JPEG2000 header, an uncaught fatal error resulted a subsequent invalid address access. We added error handling code to terminate the decoding process.

I recommend that all Foxit Reader users update their Foxit Reader 3.0, available here: Then, be sure to go to Help>Check for updates and download the stream decoder update.

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