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Update Scanner Chrome Privileged Code Injection
+-----------+ |Description| +-----------+
+------------+ |Exploitation| +------------+
This vulnerability can be exploited in several ways. As the injection point is in the chrome privileged browser zone, it is possible to bypass Same Origin Policy (SOP) protections, and also access Mozilla built-in XPCOM components. XPCOM components can be used to read and write from the file system, as well as execute arbitrary commands, steal stored passwords, or modify other Firefox extensions.
+--------+ |Solution| +--------+
Security-Assessment.com follows responsible disclosure and promptly contacted the developer after discovering the issue. The developer was contacted on June 8, 2009, and a response was received on the June 11. A fix was released on June 15, 2009.
Install latest Update Scanner version. This is available from Mozilla Add-ons web site (https://addons.mozilla.org/en-US/firefox/addon/3362).
+------+ |Credit| +------+
Discovered and advised to the Update Scanner developer June 2009 by Roberto Suggi Liverani of Security- Assessment.com. Personal Page: http://malerisch.net/
For full details regarding this vulnerability (including a detailed proof of concept exploit) download the PDF from our website: http://www.security-assessment.com/files/advisories/Update_Scanner_Firefox_Extension_Security_Advisory.pdf
For more details regarding exploitation of Firefox extensions, refer to our DEFCON 17 presentation at http://www.security-assessment.com/files/presentations/liverani_freeman_abusing_firefox_extensions_defcon17.pdf
Security-Assessment.com is a New Zealand based world leader in web application testing, network security and penetration testing. Security-Assessment.com services organisations across New Zealand, Australia, Asia Pacific, the United States and the United Kingdom.
Roberto Suggi Liverani