Microsoft Windows CSRSS CSRFinalizeContext Local Privilege Escalation Vulnerability (930178)

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  2. Windows : Microsoft Bulletins
  3. Microsoft Windows CSRSS CSRFinalizeContext Local Privilege Escalation Vulnerability (930178)
Summary
This host is missing a critical security update according to Microsoft Bulletin MS07-021.
Impact
Successful exploitation allows remote attackers to execute arbitrary code with SYSTEM privileges by establishing and closing multiple connections to the subsystem's ApiPort. Impact Level: System/Application
Solution
Run Windows Update and update the listed hotfixes or download and update mentioned hotfixes in the advisory from the below link, http://www.microsoft.com/technet/security/bulletin/ms07-021.mspx
Insight
The flaw is due to - A double-free error in the Client/Server Run-time Subsystem (CSRSS) within 'WINSRV.DLL' when handling HardError messages. - Incorrect marshaling of system resources in the Client/Server Run-time Subsystem (CSRSS) when handling connections during the startup and stopping of processes.
Affected
Microsoft Windows XP Service Pack 2 and prior. Microsoft Windows 2000 ervice Pack 4 and prior. Microsoft Windows 2K3 Service Pack 2 and prior. Microsoft Windows Vista
References
Updated on 2015-03-25
Severity
High Severity
Classification
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