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                     Secunia Research 11/08/2010

    - glpng PNG Processing 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 

* glpng 1.45

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"This is a library for OpenGL to load PNG graphics files as an OpenGL
texture as easily as possible. It also has a number of options for
generating the alpha channel and mipmaps.".

Product Link:
http://www.fifi.org/doc/libglpng-dev/glpng.html 

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4) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in glpng, which
can be exploited by malicious people to compromise an application
using the library.

1) An integer overflow error within the "pngLoadRawF()" function in
glpng.c can be exploited to cause a heap-based buffer overflow by e.g.
tricking a user into opening a specially crafted PNG file in an
application using the library.

2) An integer overflow error within the "pngLoadF()" function in
glpng.c can be exploited to cause a heap-based buffer overflow by e.g.
tricking a user into opening a specially crafted PNG file in an
application using the library.

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5) Solution 

Do not load untrusted images using the library.

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6) Time Table 

24/06/2010 - Vendor and vendor-sec notified.
11/08/2010 - Response on vendor-sec
11/08/2010 - 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 assigned 
CVE-2010-1519 for the vulnerabilities.

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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/2010-87/ 

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

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