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TITLE:
Firefox Yoono Extension Cross-Context Scripting Vulnerability

SECUNIA ADVISORY ID:
SA37468

VERIFY ADVISORY:
http://secunia.com/advisories/37468/

DESCRIPTION:
A vulnerability has been reported in the Yoono extension for Firefox,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused due to DOM event handlers being evaluated
within the "chrome:" context. This can be exploited to e.g. execute
arbitrary commands on a user's system when a user invokes the
extension on a specially crafted web page.

The vulnerability is reported in version 6.1.1. Other versions may
also be affected.

SOLUTION:
Do not use the extension on untrusted web sites.

PROVIDED AND/OR DISCOVERED BY:
Roberto Suggi Liverani and Nick Freeman

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