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Secunia Research: Ziproxy Two Integer Overflow Vulnerabilities

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                     Secunia Research 24/05/2010

           - Ziproxy Two Integer Overflow 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 

* Ziproxy 3.0.0

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 

"Ziproxy is forwarding, non-caching, compressing HTTP proxy server.
Basically it squeezes images by converting them to lower quality JPEGs
or JPEG 2000 and compresses (gzip) HTML and other text-like data.".

Product Link:
http://ziproxy.sourceforge.net/

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4) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in Ziproxy, which
can be exploited by malicious people to compromise a vulnerable 
system.

1) An integer overflow within the "jpg2bitmap()" function in
src/image.c can be exploited to cause a heap-based buffer overflow via
specially crafted JPG images.

2) An integer overflow within the "png2bitmap()" function in
src/image.c can be exploited to cause a heap-based buffer overflow via
specially crafted PNG images.

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5) Solution 

Update to version 3.0.1.

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6) Time Table 

19/05/2010 - Vendor notified.
19/05/2010 - Vendor response.
20/05/2010 - Vendor issues fixed version.
24/05/2010 - Public disclosure.

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7) Credits 

Discovered by Stefan Cornelius, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2010-1513 for the vulnerabilities.

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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://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
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http://secunia.com/advisories/

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://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
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Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2010-75/

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

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