Mozilla security researcher Jesse Ruderman reported that events in the plugin handler can be manipulated by web content to bypass same-origin policy (SOP) restrictions. This can allow for clickjacking on malicious web pages.

In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.


External Reference:

http://www.mozilla.org/security/announce/2013/mfsa2013-10.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Jesse Ruderman as the original reporter.

Statement:

Not Vulnerable. This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5 and 6