Microsoft Internet Explorer Multiple Vulnerabilities

Some vulnerabilities have been reported in Microsoft Internet Explorer, which can be exploited by malicious people to compromise a user's system.

1) An error when handling parameters passed to unspecified navigation methods can be exploited to corrupt memory via a specially crafted web page.

2) An error when fetching a file with an overly long path from a WebDAV share can be exploited to corrupt heap memory via a specially crafted web page.

3) An unspecified use-after-free error can be exploited to corrupt memory via a specially crafted web page.

4) A boundary error when processing an overly long filename extension specified inside an "EMBED" tag can be exploited to cause a stack-based buffer overflow.

Successful exploitation of the vulnerabilities may allow execution of arbitrary code.

Patches are available for these critical issues.