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Microsoft warns of remote access protocol flaw

Attackers could use it to cause affected computers to crash

By Robert McMillan

July 18, 2005 12:00 PM ET

IDG News Service - A flaw in the software used to remotely access computers running Microsoft Corp.'s Windows operating system could leave users vulnerable to a denial-of-service attack, the company said in a security advisory Friday.
The vulnerability doesn't allow attackers to gain control of Windows systems, but they could use it to repeatedly cause affected computers to crash. This would be done by creating specially crafted messages using the Remote Desktop Protocol (RDP), which is used by Windows' Terminal Services and Remote Desktop Sharing features, according Microsoft.
Microsoft is advising users to either block the port that uses RDP (Port 3389) or to disable the remote access features that use them. Terminal Services is used by the Windows 2000 and Windows Server 2003 operating systems. Remote Desktop Sharing is used by Windows XP.
As far as Microsoft knows, the vulnerability has not yet been used in an attack, and it is rated as "moderately critical" by Danish security vendor Secunia.
Microsoft will issue a patch for the vulnerability, but has not yet decided whether it will be part of the company's next scheduled group of security patches, scheduled for Aug. 9, a Microsoft spokeswoman said.

Reprinted with permission from

IDG.net
Story copyright 2009 International Data Group. All rights reserved.

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