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InduSoft Web Studio ISSymbol.ocx InternationalSeparator() Heap Overflow

This module exploits a heap overflow found in InduSoft Web Studio <= SP6. The overflow exists in the ISSymbol.ocx, and can be triggered with a long string argument for the InternationalSeparator() method of the ISSymbol control. This module uses the msvcr71.dll form the Java JRE6 to bypass ASLR.

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Module Name



  • Alexander Gavrun
  • Dmitriy Pletnev
  • James Fitts <fitts.james [at]>
  • juan vazquez <juan.vazquez [at]>



  • Automatic
  • IE 6 on Windows XP SP3
  • IE 7 on Windows XP SP3
  • IE 8 on Windows XP SP3
  • IE 7 on Windows Vista
  • IE 8 on Windows Vista
  • IE 8 on Windows 7
  • IE 9 on Windows 7


  • windows



Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use exploit/windows/browser/indusoft_issymbol_internationalseparator msf exploit(indusoft_issymbol_internationalseparator) > show targets ...targets... msf exploit(indusoft_issymbol_internationalseparator) > set TARGET <target-id> msf exploit(indusoft_issymbol_internationalseparator) > show options and set options... msf exploit(indusoft_issymbol_internationalseparator) > exploit