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Title: Unchecked Buffer in Locator Service Could Lead to Code Execution (810833) Date: 22 January, 2003 Software: Microsoft Windows NT 4.0, Windows 2000, and Windows XP Impact: Run code of the attacker's choice Max Risk: Critical Bulletin: MS03-001
Microsoft encourages customers to review the Security Bulletins at: http://www.microsoft.com/technet/security/bulletin/ms03-001.asp http://www.microsoft.com/security/security_bulletins/ms03-001.asp
The Microsoft Locator service is a name service that maps logical names to network-specific names. It ships with Windows NT 4.0, Windows 2000, and Windows XP. By default, the Locator service is enabled only on Windows 2000 domain controllers and Windows NT 4.0 domain controllers; it is not enabled on Windows NT 4.0 workstations or member servers, Windows 2000 workstations or member servers, or Windows XP.
A security vulnerability results from an unchecked buffer in the Locator service. By sending a specially malformed request to the Locator service, an attacker could cause the Locator service to fail, or to run code of the attacker's choice on the system.
The Locator service is not enabled by default on any affected versions of Windows with the exception of Windows 2000 domain controllers and Windows NT 4.0 domain controllers.
A properly-configured firewall would block the calls to the Locator service, which would protect an affected machine from an Internet-based attack.
for information on obtaining this patch.
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