JavaScript vulnerability has been reported by Fortify which enables to hack IE or Mozilla web browser session. Dubbed as JavaScript hijacking the vulnerability can be exploited in Web 2.0 applications using AJAX or Microsoft Atlas or GWT and other open source tools. The security vendor has the specific attack code and along with an advice as to how the vulnerability can be corrected.

Brian Chess, Chief scientist, Fortify stated:

Fortify has identified JavaScript hijacking attack code to exploit the Microsoft browser as well, but is refraining from currently making that publicly available. We figured out how this attack is possible and we need to educate software developers on it.

The security vendor has recommended that all programs communicating using JavaScript should take defensive steps such as session identifiers as part of each request returning JavaScript. This would entirely defeat the purpose of forgery attacks. Check the advisory issued by Fortify out here.