Exploit Author: Amit Sangra
CVE : CVE-2017-7783
Mozilla Firefox < 55 – Denial of Service
If a long user name is used in a username/password combination in a site URL (such as http://UserName:[email protected]), the resulting modal prompt will hang in a non-responsive state or crash, causing a denial of service.
An attacker can create a webpage having some content and exploit.
Now once a victim visits this webpage, his browser gets locked out and he is forcibly made to view attacker supplied content.
Update to version 55