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GD Graphics Library "gdImageStringFTEx()" Denial of Service

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Release Date:  2007-01-29    Views:  12,127

Secunia Advisory SA23916

Where:

From remote

Impact:

DoS

Solution Status:

Unpatched

CVE Reference(s):

Description


Kees Cook has reported a vulnerability in GD Graphics Library, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within the "gdImageStringFTEx()" function in gdft.c, which can be exploited to increment the terminating NULL of a string, potentially resulting in a buffer overflow.

Successful exploitation requires that a JIS-encoded font is used.


Solution:
Do not use JIS-encoded fonts with an application using GD Graphics Library.

Provided and/or discovered by:
Kees Cook

Original Advisory:
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=224607

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: GD Graphics Library "gdImageStringFTEx()" Denial of Service

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