Within hours of Apple's public release of the beta for Aviv Raff highlighted in a blog post the company's product statement, that reads: "Apple's engineers designed Safari to be secure from day one." Raff found a vulnerability, a memory corruption error that could allow an attacker to insert malicious code on a Windows machine, within three minutes using publicly available fuzzing tools., three security researchers independently found holes within the new browser. Researcher
Security researcher David Maynor, posting on his Errata security blog, said he was also able to generate a memory corruption error "in no time." By the end of the day, he was able to generate a total of six bugs--four producing a denial of service (crash), and two capable of executing remote code.
Veteran security researcher Thor Larholm wrote in his blog that he found a "0day" vulnerability in Safari within two hours. The flaw exists in how Safari handles URL protocols within Windows, causing a denial of service (crash). Larholm has published an exploit to demonstrate the flaw.
All of the vulnerabilities were found on Windows machines; none of the researchers could say whether these flaws also existed on the Mac OS.