Secunia Research: Foxit Reader ActiveX Control "OpenFile()" Buffer Overflow Vulnerability

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                     Secunia Research 21/07/2011

                   - Foxit Reader ActiveX Control -
            - "OpenFile()" Buffer Overflow Vulnerability -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

* Foxit Reader ActiveX Control version 2.0.1.524.
* Foxit Reader version 5.0.1.0523.

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"The Foxit Reader is a small, fast, and feature rich PDF viewer which
allows you to open, view, and print any PDF file."

Product Link:
http://www.foxitsoftware.com/Secure_PDF_Reader/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Foxit Reader, which
can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in the 
FoxitReaderOCX ActiveX control when processing the "OpenFile()" 
method. This can be exploited to cause a heap-based buffer overflow 
via an overly long string passed in the "strFilePath" parameter.

Successful exploitation allows execution of arbitrary code.

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5) Solution 

Update to version 5.0.2.0718.

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6) Time Table 

19/01/2010 - Reported by a third party in a control not marked "safe 
             for scripting".
16/11/2010 - Vendor releases version 4.3.0.1110 with a fixed control 
             now marked "safe for scripting".
26/05/2011 - Vendor releases version 5.0.1.0523.
14/06/2011 - Secunia Research discovers similar vulnerability as the 
             one previously fixed in the "safe for scripting" control.
20/06/2011 - Vendor notification.
20/06/2011 - Vendor acknowledgement.
21/07/2011 - Coordinated public disclosure.

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7) Credits 

Discovered by Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has not yet
assigned a CVE identifier for the vulnerability.

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9) About Secunia

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2011-55/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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