Mischa Spiegelmock made a presentation at the ToorCon hacker conference, disclosing details of a Firefox JavaScript vulnerability. At the time, the flaw was tagged as critical and unpatchable. Three days later it has become literally laughable, as the vulnerability turned to be nothing more than a hoax. Spiegelmock made the following statement in relation to the JavaScript flaw and agreed to let Mozilla publish it:

"The main purpose of our talk was to be humorous.

As part of our talk we mentioned that there was a previously known Firefox vulnerability that could result in a stack overflow ending up in remote code execution. However, the code we presented did not in fact do this, and I personally have not gotten it to result in code execution, nor do I know of anyone who has.

I have not succeeded in making this code do anything more than cause a crash and eat up system resources, and I certainly haven't used it to take over anyone else's computer and execute arbitrary code.

I do not have 30 undisclosed Firefox vulnerabilities, nor did I ever make this claim. I have no undisclosed Firefox vulnerabilities. The person who was speaking with me made this claim, and I honestly have no idea if he has them or not.

I apologize to everyone involved, and I hope I have made everything as clear as possible.

Sincerely,
Mischa Spiegelmock"

Humorous or not, sincere or not, Window Snyder, Mozilla's security chief stated: "Even though Mischa hasn't been able to achieve code execution, we still take this issue seriously. We will continue to investigate."