Microsoft releases patches to fix 20 flaws

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April 13, 2004 (Computerworld) -- Microsoft Corp. today released four new security bulletins detailing patches for several critical vulnerabilities, including one that fixes 14 separate flaws, in a wide range of Windows software.
The patches are part of the company's monthly rollout of security fixes and address a total of 20 flaws. The products affected by the flaws include Windows NT Workstation and Server, Windows 98, Windows XP, Windows 2000 and Windows Server 2003.
The patch detailed in Microsoft Security Bulletin MS04-011 is one of the biggest software updates the company has released in terms of the number of flaws it addresses.
A total of 14 vulnerabilities are addressed in the update, some of which are critical, said Stephen Toulouse, security program manager for Microsoft's Security Response Center.
In some cases, the patch addresses holes that are critical in some products but aren't as serious in others, Toulouse said.
Microsoft decided to address all these flaws in one patch because the fixes are all in the same file, Toulouse said.
"When we see the opportunity to ship one set of files that contain multiple fixes, we really attempt to do that" instead of shipping separate fixes, Toulouse said. The approach makes it easier for users to apply such patches, he said. "It was the best solution for our customers."
Among the critical flaws addressed in MS04-011 is a buffer overrun vulnerability that affects the Local Security Authority Subsystem Service (LSASS) interface for managing local security and domain authentication functions. Attackers who successfully exploit that flaw could gain complete control of a victim's system. Windows 2000 and Windows XP systems are the ones most at risk from this flaw, according to Microsoft.
Another vulnerability addressed in the same bulletin is a buffer overrun in the Private Communications Transport (PCT) protocol, which is part of the Microsoft Secure Sockets Layer library.

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