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Google's latest Android mobile OS comes with features to divert hackers from installing malware that leads to information leakage, buffer overflows, and memory vulnerabilities.
The flaw, which is being leveraged in "limited, targeted attacks," allows remote code execution, Microsoft warns.
In rare move that highlights severity of security hole in popular Internet Explorer, US Computer Emergency Readiness Team and UK counterpart say some IE users may want to "consider employing an alternate browser" till flaw is patched.
Quietly released guide outlines the security architecture, encryption, and data protection features on the mobile operating system.
Microsoft stands behind the security and privacy of Internet Explorer 8 following a hacking contest that was able to exploit certain vulnerabilities in the browser.
Security experts say they were able to bypass several security measures in Chrome running on Windows.
Researchers say a previously unknown hole in IE has already been used to deliver a trojan in real-world attacks.
Something similar to the zero-day exploit recently discovered in Adobe's Reader and Acrobat tools has been found for its Flash Player as well.
No efforts were made to attack Chrome, Firefox, Android, or Windows Phone 7 in the annual hacker contest at CanSecWest.
Microsoft is downplaying the problem, but Core Security says the vulnerability could allow an attacker to bypass security defenses to compromise virtualized Windows systems.