Mozilla has patched two vulnerabilities relating to the way browsers interact with SSL certificates. The flaws, which potentially could permit man-in-the-middle attacks, were disclosed by two researchers, Dan Kaminsky and Moxie Marlinspike, in separate presentations at last week's Black Hat conference in Las Vegas. Marlinspike showed how a heap overflow bug could be exploited to present a specially crafted SSL certificate to the user, while Kaminsky revealed a way to obtain a certificate that would work on a victim site. Users are encouraged to download the latest version of Firefox 3.5. — DK