Firefox 1.5.0.2 suffers from a buffer overflow which may lead to execution of arbitrary code. POC included that crashes firefox 1.5.0.2.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/45830/ffdos.txt
Source: https://packetstormsecurity.com/files/45830/ffdos.txt.html