Secunia Research: activePDF DocConverter Applix Graphics Parsing Vulnerabilities

======================================================================

                 Secunia Research 08/04/2008

• activePDF DocConverter Applix Graphics Parsing Vulnerabilities -

======================================================================
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

======================================================================
1) Affected Software

• activePDF DocConverter 3.8.4.0

NOTE: Other versions may also be affected.

======================================================================
2) Severity

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

======================================================================
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/

======================================================================
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.

======================================================================
5) Solution

The vulnerabilities will be addressed in an upcoming version 3.8.4.5.

======================================================================
6) Time Table

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

======================================================================
7) Credits

Discovered by Dyon Balding, Secunia Research.

======================================================================
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.

======================================================================
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/

======================================================================
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/

======================================================================