Hi, this vulnerability is probably affected to MS Windows 2003 Server with all hotfix.. we have several live and testing servers in then world and on all server are some situation 1) workstation service doesn't working or restart automaticly after few hours.. 2) servers are fully firewalled and secured but only port 80 a 3389 is allowed on firewall 3) server have started Terminal Services Licensing service.. 4) Application log on this server can't be opened. mmc.exe fall after click application log without error message.. some problems are reported on our customers.. what's that.. New bug or zero day exploit for 2003 servers? eA> eEye Research - http://research.eeye.com eA> Workstation Service NetpManageIPCConnect Buffer Overflow eA> Release Date: eA> November 14, 2006 eA> Date Reported: eA> July 25, 2006 eA> Severity: eA> High (Remote Code Execution) eA> Vendor: eA> Microsoft eA> Systems Affected: eA> Windows 2000 (Remote Code Execution) eA> Windows XP SP1 (Local Privilege Escalation) eA> Overview: eA> A flaw exists in a default Windows component called the "Workstation eA> Service" that when exploited allows for remote code execution in SYSTEM eA> context, allowing an attacker to take complete control of affected eA> systems. eA> Technical Details: eA> In the Workstation Service module called wkssvc.dll, the eA> NetpManageIPCConnect function has a call to "swprintf" with an unchecked eA> buffer. The input buffer is controllable by the remote attacker. eA> .text:76781D67 mov edi, [ebp+arg_0] eA> ... eA> .text:76781D90 lea eax, [ebp+var_2CC] eA> ... eA> .text:76781DA0 push edi eA> .text:76781DA1 push offset "%ws\\IPC$" eA> .text:76781DA6 push eax eA> .text:76781DA7 call ds:swprintf eA> This function is called by NetpJoinDomain, which is eventually called by eA> the NetrJoinDomain2 function, which is exposed through RPC. eA> The IDL for NetrJoinDomain2 looks like this: eA> long _NetrJoinDomain2@28 ( eA> [in][unique][string] wchar_t * arg_1, eA> [in][string] wchar_t * arg_2, eA> [in][unique][string] wchar_t * arg_3, eA> [in][unique][string] wchar_t * arg_4, eA> [in][unique] struct_C * arg_5, eA> [in] long arg_6 eA> ); eA> arg_2 will contain string with format like <Domain name>+"\"+<Hostname>. eA> <Hostname> will be passed as NetpManageIPCConnect's first argument. The eA> variable is under the attacker's control and is passed to swprintf, eA> which causes a stack-based buffer overflow. eA> For this vulnerable code to be reached, we must provide a valid and live eA> <Domain name> as a part of the string. We can set up a fake domain eA> server anywhere reachable from the vulnerable machine on the Internet. eA> P.S. If you despise Birkenstocks, are not afraid of your Tequila, and eA> are well versed in reverse engineering, bug finding, or are looking to eA> learn, we are hiring both junior and senior security researchers. Send eA> your resume (blathering of college course work, degrees, and past eA> experience we don't care about) or more importantly a description of why eA> you would be a good researcher to skunkworks@xxxxxxxxx eA> Credit: eA> Discovery: JeongWook Matt Oh eA> Additional Research: Derek Soeder eA> Related Links: eA> Retina Network Security Scanner - Free Trial eA> Blink Endpoint Vulnerability Prevention - Free Trial eA> Greetings: eA> Dugsong, Ohhara, Ryan Lee, Pilot, Sakai, Gonan and all the Korean eA> Bugtruck Mailing List Subscribers eA> Copyright (c) 1998-2006 eEye Digital Security eA> Permission is hereby granted for the redistribution of this alert eA> electronically. It is not to be edited in any way without express eA> consent of eEye. If you wish to reprint the whole or any part of this eA> alert in any other medium excluding electronic medium, please email eA> alert@xxxxxxxx for permission. eA> Disclaimer eA> The information within this paper may change without notice. Use of eA> this information constitutes acceptance for use in an AS IS condition. eA> There are no warranties, implied or express, with regard to this eA> information. In no event shall the author be liable for any direct or eA> indirect damages whatsoever arising out of or in connection with the use eA> or spread of this information. Any use of this information is at the eA> user's own risk. -- S pozdravem, security-list security-list@xxxxxxxxxxxxx
