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Zero Day Initiative Advisory 12-168

Zero Day Initiative Advisory 12-168
Posted Aug 29, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-168 - 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.

tags | advisory, remote, overflow, arbitrary, activex
advisories | CVE-2011-0340
SHA-256 | d3906c04c1551295a1d49431e04af6182300549f596f348f989e9e3ea751e535

Zero Day Initiative Advisory 12-168

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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

- -- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:

http://twitter.com/thezdi

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