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The patch, which Microsoft calls the Q811493 hotfix, was distributed via Microsoft's security Web site and the automatic Windows Update service. It fixes a security flaw in the Windows kernel, the core of the Windows operating system. The vulnerability is rated "important" by Microsoft, one notch below the highest level on the vendor's severity rating scheme.
The flaw allows an attacker to raise his privilege level on a vulnerable system. However, to exploit the flaw an attacker needs to be able to log on to a system, either at the computer or via a terminal connection, mitigating the risk.
Users advising other users online suggest home users experiencing system slowdowns remove the patch as corporate environments with terminal servers and client systems accessed by multiple users are most at risk. Microsoft, however, urges all customers to apply the patch and call the Microsoft helpdesk if there are any performance issues afterward, Toulouse said.
Microsoft security bulletin MS03-013 can be found at: http://www.microsoft.com/technet/security/bulletin/MS03-013.asp
The flaw allows an attacker to raise his privilege level on a vulnerable system. However, to exploit the flaw an attacker needs to be able to log on to a system, either at the computer or via a terminal connection, mitigating the risk.
Users advising other users online suggest home users experiencing system slowdowns remove the patch as corporate environments with terminal servers and client systems accessed by multiple users are most at risk. Microsoft, however, urges all customers to apply the patch and call the Microsoft helpdesk if there are any performance issues afterward, Toulouse said.
Microsoft security bulletin MS03-013 can be found at: http://www.microsoft.com/technet/security/bulletin/MS03-013.asp
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