InduSoft Thin Client ISSymbol InternationalSeparator Remote Code Execution Vulnerability

August 29th, 2012
ZDI-12-168 ZDI-CAN-1342

CVE ID

CVE-2011-0340

CVSS Score

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

Affected Vendors

Indusoft

Affected Products

WebStudio

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.

Additional Details

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

Alexander Gavrun

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