InduSoft Thin Client ISSymbol InternationalSeparator Remote Code Execution

2012.08.29
Risk: High
Local: No
Remote: Yes
CWE: CWE-119


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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 -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 10.2.0 (Build 1950) Charset: utf-8 wsBVAwUBUD4cZ1VtgMGTo1scAQJoagf/ZpDTiahOQlERNABRglBe8krgQHhSHddX qVTQjFEyoOL8df5cA/I3JLJxEYRzcT0k8FSdoHUAMDWA8Oxv1BB62r7fgHC1BFjp jbH6u0mL+eYd95jqwfYaruakhABiCRR73nCxYvYGb1Bvx6piBDneD9E+Nx+qycF5 HKb5Fr0wwT+sWssIsnAHx5jDUamdRyQfOR1MAzb6GfKWDsRqwr/T5hWvRLqbZ3Cj VXwmd+MIIAQZIMJ8swKgBvbSeV4tcePun1NhqJYAJtySYR6a6oF112Gk+kXlNXDi EvynyGSXvzLMKEd+vmzSBbVeftCxNQJ8Ce4Vg+LYMGk0YHfoupt3gQ== =Fw26 -----END PGP SIGNATURE-----

References:

http://www.zerodayinitiative.com/advisories/ZDI-12-168


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