updated 02:10 pm EDT, Wed August 1, 2007
Safari update for Windows
Apple has issued an update to its Safari Web browser for Windows in an effort to beef up security. The patch fixes several vulnerabilities related to adding bookmarks, visiting malicious websites, Java applets, and URL masquerading. Apple's update applies fixes to Safari and WebKit, plugging a total of four holes. The specific risks include adding bookmarks, visiting a malicious website, and accessing URLs with look-alike characters to load a different page than the user expects.
Apple has offered details on the security fixes:
A stack buffer overflow vulnerability exists in Safari's bookmark handling. By enticing a user to add a bookmark with an overlong title, an attacker may trigger the issue which may lead to an unexpected application termination or arbitrary code execution. This update addresses the issue by performing proper bounds checking. This issue does not affect Mac OS X systems.
Safari provides an "Enable Java" preference, which when unchecked should prevent the loading of Java applets. By default, Java applets are allowed to be loaded. Navigating to a maliciously crafted web page may allow a Java applet to be loaded without checking the preference. This update addresses the issue through a stricter check of the "Enable Java" preference. Credit to Scott Wilde for reporting this issue.
The International Domain Name (IDN) support and Unicode fonts embedded in Safari could be used to create a URL which contains look-alike characters. These could be used in a malicious web site to direct the user to a spoofed site that visually appears to be a legitimate domain. This update addresses the issue by through an improved domain name validity check.