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Secunia Research: Mono libgdiplus Image Processing Three Integer Overflows

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                     Secunia Research 23/08/2010

     - Mono libgdiplus Image Processing Three Integer Overflows -

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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 

* libgdiplus 2.6.7

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 

"Libgdiplus is the Mono library that provide a GDI+ comptible API on
non-Windows operating systems".

Product Link:
http://www.mono-project.com/Libgdiplus

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4) Description of Vulnerability

Secunia Research has discovered three vulnerabilities in libgdiplus 
for Mono, which can be exploited by malicious people to compromise an
application using the library.

1) An integer overflow error within the "gdip_load_tiff_image()" 
function in src/tiffcodec.c can be exploited to cause a heap-based 
buffer overflow by e.g. processing specially crafted TIFF images in 
an application using the library.

2) An integer overflow error within the 
"gdip_load_jpeg_image_internal()" function in src/jpegcodec.c can be 
exploited to cause a heap-based buffer overflow by e.g. processing 
specially crafted JPEG images in an application using the library.

3) An integer overflow error within the "gdip_read_bmp_image()"
function in src/bmpcodec.c can be exploited to cause a heap-based 
buffer overflow by e.g. processing specially crafted BMP images in an 
application using the library.

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5) Solution 

Do not process untrusted images in an application using the library.

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6) Time Table 

12/08/2010 - Vendor notified.
12/08/2010 - Vendor response.
19/08/2010 - Accidental public disclosure by an involved party. 
23/08/2010 - 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-2010-1526 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/2010-102/

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

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