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Moderately critical

YaBB Attachment Script Insertion Vulnerability

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Release Date:  2005-11-09    Last Update:  2006-01-13    Views:  9,463

Secunia Advisory SA17411

Where:

From remote

Impact:

Unknown, Cross Site Scripting

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A vulnerability has been discovered in YaBB, which can be exploited by malicious people to conduct script insertion attacks.

The vulnerability is caused due to an input validation error in the attachment upload handling. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site by attaching a malicious HTML document with a valid file extension (e.g. ".gif") in a post.

Successful exploitation requires that the attachment is accessed directly in the Microsoft Internet Explorer browser (e.g. by opening an attachment in a post).

Some other issues which may be security related have also been reported.

The vulnerability has been confirmed in version 2.0. Prior versions may also be affected.


Solution:
Update to version 2.1.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Reported by vendor.

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: YaBB Attachment Script Insertion Vulnerability

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