Description
Multiple buffer overflows in the ISSymbol ActiveX control in ISSymbol.ocx 61.6.0.0 and 301.1009.2904.0 in the ISSymbol virtual machine, as distributed in Advantech Studio 6.1 SP6 61.6.01.05, InduSoft Web Studio before 7.0+SP1, and InduSoft Thin Client 7.0, allow remote attackers to execute arbitrary code via a long (1) InternationalOrder, (2) InternationalSeparator, or (3) LogFileName property value; or (4) a long bstrFileName argument to the OpenScreen method.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
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InduSoft Web Studio ISSymbol.ocx InternationalSeparator() Heap Overflow
exploit/windows/browser/indusoft_issymbol_internationalseparator
Exploit-DB 1
- InduSoft Web Studio - 'ISSymbol.ocx InternationalSeparator()' Heap Overflow (Metasploit) EDB-23500 · remote · Dec 20, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- ICSA-12-249-03 InduSoft ISSymbol ActiveX Control Buffer Overflow CISA ICS & IT advisories · Jun 18, 2025
- ICSA-12-137-02 Advantech Studio ISSymbol ActiveX Buffer Overflow CISA ICS & IT advisories · Jun 6, 2025
References
- 43116 third-party-advisory
- 47596 vdb-entry
- http://secunia.com/secunia_research/2011-37/
- ADV-2011-1116 vdb-entry
- http://ics-cert.us-cert.gov/advisories/ICSA-12-249-03
- 42928 third-party-advisory
- http://www.us-cert.gov/control_systems/pdf/ICSA-12-137-02.pdf
- ADV-2011-1115 vdb-entry
- http://www.indusoft.com/hotfixes/hotfixes.php
- http://secunia.com/secunia_research/2011-36/
- http://www.advantechdirect.com/eMarketingPrograms/AStudio_Patch/AStudio7.0_Patch_Final.htm