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activePDF DocConverter Applix Graphics Parsing Vulnerabilities



Secunia Research: activePDF DocConverter Applix Graphics Parsing Vulnerabilities
Secunia Research: activePDF DocConverter Applix Graphics Parsing Vulnerabilities



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                     Secunia Research 08/04/2008

  - activePDF DocConverter Applix Graphics Parsing Vulnerabilities -

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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 

* activePDF DocConverter 3.8.4.0

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: From remote
Where:  System access

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3) Vendor's Description of Software 

"activePDF DocConverter enables you to convert to PDF from over 280
different file types, without requiring manual intervention."

Product Link:
http://www.activepdf.com/products/serverproducts/docconverter/ 

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4) Description of Vulnerability

Secunia Research has discovered some vulnerabilities in activePDF
DocConverter, which can be exploited by malicious people to compromise
a vulnerable system when converting Applix documents.

1) An unsafe call to "sscanf()" when parsing the "ENCODING" attribute
of the "*BEGIN" tag can be exploited to cause a stack-based buffer
overflow.

2) A boundary error when parsing overly long tokens from the input
file can be exploited to cause a heap-based buffer overflow.
 
3) A boundary error when parsing the initial "*BEGIN" tag can be
exploited to cause stack-based buffer overflow.
  
Successful exploitation of the above vulnerabilities allows execution
of arbitrary code.
 
4) A logic error when parsing long tokens can result in an infinite
loop.  Exploitation will result in maximum CPU usage until an
application-configured timeout expires. In some cases memory usage
will increase until the OS terminates the process.

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5) Solution 

The vulnerabilities will be addressed in an upcoming version 3.8.4.5.

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6) Time Table 

21/11/2007 - Vendor notified.
21/11/2007 - Vendor response.
08/04/2008 - Public disclosure.

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7) Credits 

Discovered by Dyon Balding, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2007-5405 for the overflows and CVE-2007-5406 for the infinite
loop.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/ 

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/ 

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/ 

Secunia regularly hires new skilled team members. Check the URL below 
to see currently vacant positions:

http://secunia.com/secunia_vacancies/ 

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-97/ 

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

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