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  Microsoft Security Bulletin MS03-034: Flaw in NetBIOS Could Lead to Information Disclosure (824105)
Time: 00:01 EST/05:01 GMT | News Source: ActiveWin.com | Posted By: Robert Stein

Network basic input/output system (NetBIOS) is an application programming interface (API) that can be used by programs on a local area network (LAN). NetBIOS provides programs with a uniform set of commands for requesting the lower-level services required to manage names, conduct sessions, and send datagrams between nodes on a network. This vulnerability involves one of the NetBT (NetBIOS over TCP) services, namely, the NetBIOS Name Service (NBNS). NBNS is analogous to DNS in the TCP/IP world and it provides a way to find a system’s IP address given its NetBIOS name, or vice versa. Under certain conditions, the response to a NetBT Name Service query may, in addition to the typical reply, contain random data from the target system’s memory. This data could, for example, be a segment of HTML if the user on the target system was using an Internet browser, or it could contain other types of data that exist in memory at the time that the target system responds to the NetBT Name Service query.

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#576 By 4240821 (82.115.4.230) at 7/29/2025 5:22:01 PM
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