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MySource Cross-Site Scripting and Unauthenticated Proxy Vulnerability

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Release Date:  2006-09-26    Last Update:  2006-09-29    Views:  8,297

Secunia Advisory SA22060

Where:

From remote

Impact:

Security Bypass, Cross Site Scripting

Solution Status:

Vendor Workaround

CVE Reference(s):

Description


Patrick Webster has reported a vulnerability in MySource, which can be exploited by malicious people to bypass certain security restrictions and conduct cross-site scripting attacks.

It is possible to include the contents of arbitrary web pages by passing "fetch_url" to the "sq_remote_page_action" parameter and the URL of the web page to include to the "sq_remote_page_url" parameter (or in newer versions by passing a base64 encoded URL to the "sq_content_src" parameter). This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site or to abuse an affected site as an HTTP proxy to e.g. bypass certain security restrictions.

The vulnerability is reported in MySource Matrix 3.8 and MySource 2.x. Other versions may also be affected.


Solution:
Newer versions offer a whitelist functionality to restrict inclusion to trusted sites only.

Provided and/or discovered by:
Patrick Webster

Original Advisory:
http://users.tpg.com.au/adsl2dvp/advisories/200607-mysourcematrix.txt

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: MySource Cross-Site Scripting and Unauthenticated Proxy Vulnerability

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