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Secunia Research: PentaZip Archive Handling Three Vulnerabilities

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                     Secunia Research 18/01/2007

           - PentaZip Archive Handling 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 

* PentaZip 8.5.1.190
* PentaSuite-PRO 8.5.1.221

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately Critical
Impact: System Access
        Denial of Service
Where:  From Remote

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3) Vendor's Description of Software

"PentaZip 8 is our latest release of our award winning File 
Compression program! PentaZip has more features to store, manage and
view files than any other compression program on the market. Click on
the PentaZip logo to download a trial version. PentaSuite includes
PentaZip."

Product Link:
http://www.pentazip.com/pw/Download_Central.htm

====================================================================== 
4) Description of Vulnerability

Secunia Research has discovered some vulnerabilities in PentaZip,
which can be exploited by malicious, local users to cause a DoS
(Denial of Service) and malicious people to compromise a user's
system.

1) A boundary error within the TZipTV component when listing files in
ARJ archives can be exploited to cause a heap-based buffer overflow
via a specially-crafted ARJ archive with an overly large ARJ header
block.

Successful exploitation allows execution of arbitrary code when a
malicious ARJ archive is listed.

2) An input validation error when extracting various archives makes
it possible to have files extracted to arbitrary locations outside
the specified directory using the "../" directory traversal sequence.

3) An error in choShilA.bpl causes the system to crash when right-
clicking on a file with an overly long file name.

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5) Solution 

A fixed version should reportedly be forthcoming.

Do not extract or open untrusted archives.

To reduce the risk, never extract files as an administrative user.

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

27/11/2006 - Vendor notified.
04/12/2006 ? Vendor reply: Requested for more information on #3.
11/12/2006 ? Vendor reply: Updates on patch schedule, confirms #3.
03/01/2007 ? Request for status update.
08/01/2007 ? Reminder sent.
08/01/2007 ? Vendor reply with workaround version.
10/01/2007 ? Mail sent indicating status as ?Vendor Workaround?
             since vulnerabilities still exist.
10/01/2007 ? Vendor requests additional PoCs.
11/01/2007 ? PoCs sent.
12/01/2007 ? Vendor reply with fixed version.
18/01/2007 - Public disclosure.

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

Discovered by JJ Reyes, Secunia Research.

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8) References

Secunia Research:
http://secunia.com/secunia_research/2006-50

The Common Vulnerabilities and Exposures (CVE) project has assigned 
the following CVE identifiers:

CVE-2006-2482 - TZipTV component buffer overflow (#1)
CVE-2006-5963 - Directory traversal (#2)
CVE-2006-5964 - Filename crash (#3)

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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/2006-72/

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

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