Reported September 3, 2003, by Microsoft.




  • Windows Server 2003

  • Windows XP

  • Windows 2000

  • Windows NT Server 4.0

  • Windows NT Server 4.0, Terminal Server Edition (WTS)




A vulnerability in Microsoft NetBIOS can result in information disclosure. This vulnerability stems from a flaw in the NetBIOS Name Service (NBNS). An attacker can exploit this vulnerability by sending a NetBT Name Service query to the target system, then examining the response to see if it includes random data from that system's memory.




Microsoft has released Security Bulletin MS03-034, "Flaw in NetBIOS Could Lead to Information Disclosure (824105)," to address this vulnerability and recommends that affected users apply the appropriate patch mentioned in the bulletin.



Discovered by Mike Price of Foundstone Labs.