InduSoft Thin Client ISSymbol InternationalSeparator Remote Code Execution

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ZDI-12-168 : InduSoft Thin Client ISSymbol InternationalSeparator Remote
Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-168
August 29, 2012

- -- CVE ID:
CVE-2011-0340

- -- CVSS:
7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

- -- Affected Vendors:
Indusoft

- -- Affected Products:
Indusoft WebStudio

- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12446.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

- -- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Indusoft Thin Client. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The specific flaw exists within ISSymbol.ocx ActiveX component. The process
performs insufficient bounds checking on user-supplied data passed in as
the 'InternationalSeparator' parameter which results in a heap overflow.
This vulnerability can be leveraged to execute code under the context of
the user running the browser.

- -- Vendor Response:
Indusoft has issued an update to correct this vulnerability. More details
can be found at:
http://www.indusoft.com/hotfixes/hotfixes.php


- -- Disclosure Timeline:
2011-12-19 - Vulnerability reported to vendor
2012-08-29 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:
* Alexander Gavrun

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