As Attacks Escalate, Microsoft Ships Emergency Windows Patch

Via Threatpost.com -

Microsoft has rushed out and emergency patch for all supported versions of Windows to cover a gaping -- and under attack -- security flaw in the way shortcuts are displayed by the operating system.

The out-of-band update, rated “critical,” comes less than 20 days after the discovery of a sophisticated malware attack that combined the Windows zero-day flaw with security problems in SCADA systems and used stolen signed drivers to bypass security software.

Copycat attackers also added exploits for the Windows vulnerability into malware families, putting pressure on Redmond to release today’s emergency fix.

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http://www.microsoft.com/technet/security/Bulletin/MS10-046.mspx

This security update resolves a publicly disclosed vulnerability in Windows Shell. The vulnerability could allow remote code execution if the icon of a specially crafted shortcut is displayed. An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

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Windows 2000 and Windows XP Service Pack 2 are vulnerable, but are no longer officially supported by Microsoft. Upgrading is the only protection option for those older operating systems.