Juan Pablo Lopez Yacubian has discovered two vulnerabilities in Safari, which can be exploited by malicious people to conduct spoofing attacks or potentially compromise a user’s system.
1) An error when downloading e.g. a .ZIP file with an overly long filename can be exploited to cause a memory corruption.
Successful exploitation may allow execution of arbitrary code.
2) An error in the handling of windows can be exploited to display arbitrary content while showing the URL of a trusted web site in the address bar.
The vulnerabilities are confirmed in version 3.1 for Windows. Other versions may also be affected.
Do not browse untrusted web sites.