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Exploit devastates WinNT/2K security | |
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||
| Time: 09:26 EST/14:26 GMT | News Source: The Register | Posted By: Robert Stein | ||
|
An application called SMBRelay, written by cDc's Sir Dystic, exploits a design flaw in the SMB (Server Message Block) protocol on Win NT/2K boxes, easily enabling an attacker to interpose himself between the client and the server. The program enables access to the server using the client's authentication by acting as a 'man in the middle' to both. For this reason it's quite difficult to defend against, unless a user blocks port 139 -- which is needed for NetBIOS sessions and therefore not practical for networked boxes -- or by using NTLMv2 which employs 128bit encrypted keys and eliminates LANMAN (NT LAN Manager, or NTLM) hashes for NT clients. | ||
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| #1 By 20 (Unknown) at 4/19/2001 2:13:00 PM |
<!-- insert standard Register is FOS -->
<include file="/registerIsFoS.html"/>
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| #2 By 61 (Unknown) at 4/19/2001 3:54:00 PM |
| If you are a half-way decent admin and on a pure Win2k network (from a Windows standpoint), then you DON'T use netbios, simply because it's not needed at all. |
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