Secunia Research: GdkPixbuf BMP Image Handling Denial of Service Vulnerability

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                     Secunia Research 10/03/2004 

  - GdkPixbuf BMP Image Handling Denial of Service Vulnerability -

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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
About Secunia........................................................8
Verification.........................................................9

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1) Affected Software 

GdkPixbuf versions prior to 0.20.

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2) Severity 

Rating:  Not critical 
Impact:  Denial of Service 
Where:   From Remote 

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3) Vendor's Description of Software 
"The GdkPixbuf library is a replacement for Imlib. GdkPixbuf provides
the following: a basic data structure to provide reference-counted 
images; functions to load images synchronously from disk or 
progressively from arbitrary data buffers; and convenience functions 
to transform pixbufs and render them to drawables.".

Product link:
http://developer.gnome.org/arch/imaging/gdkpixbuf.html

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4) Description of Vulnerability 
Secunia Research has discovered a vulnerability in GdkPixbuf, which 
can be exploited by malicious people to crash certain applications on 
a user's system.

The vulnerability is caused due to a handling error when displaying 
BMP images. This can be exploited by tricking a user into viewing a 
specially crafted BMP image with an extremely large value in the 
"bfOffBits" field of the BMP file header.

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5) Solution 

Update to version 0.20 or later.

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6) Time Table 

17/02/2004 - Vulnerability discovered. 
18/02/2004 - Vendor notified.
18/02/2004 - Vendor confirms vulnerability.
10/03/2004 - Public disclosure.

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7) Credits 

Discovered by Secunia Research.

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8) About Secunia 

Secunia collects, validates, assesses, and writes advisories regarding 
all the latest software vulnerabilities disclosed to the public. These 
advisories are gathered in a publicly available database at the 
Secunia website: 

http://secunia.com/

Secunia offers services to our customers enabling them to receive all 
relevant vulnerability information to their specific system 
configuration. 

Secunia offers a FREE mailing list called Secunia Security Advisories: 

http://secunia.com/secunia_security_advisories/

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9) Verification 

Please verify this advisory by visiting the Secunia website: 
http://secunia.com/secunia_research/2004-3/
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