Verisign's ongoing Quarterly Vulnerability Challenge

Computer security firm Verisign (iDefense) is offering some hefty bounties on vulnerabilities reported in Microsoft's Windows Vista operating system and IE7 web browser. It's a part of Verisign's ongoing Quarterly Vulnerability Challenge, where hackers of the world are invited to exploit various categories of software for fun and profit...

Vulnerability Challenge Ground Rules:

• The vulnerability must be remotely exploitable and must allow arbitrary code execution in a default installation of one of the technologies listed above
• The vulnerability must exist in the latest version of the affected technology with all available patches/upgrades applied
• 'RC' (Release candidate), 'Beta', 'Technology Preview' and similar versions of the listed technologies are not included in this challenge
• The vulnerability must be original and not previously disclosed either publicly or to the vendor by another party
• The vulnerability cannot be caused by or require any additional third party software installed on the target system
• The vulnerability must not require additional social engineering beyond browsing a malicious site