ZDI-09-093: Adobe Flash Player ActionScript Exception Handler Integer Overflow Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-09-093 December 9, 2009 -- CVE ID: CVE-2009-3799 -- Affected Vendors: Adobe -- Affected Products: Adobe Flash Player -- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability by Digital Vaccine protection filter ID 8457. 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 Adobe Flash Player. User interaction is required to exploit this vulnerability in that the target must visit a malicious web page or open a malicious SWF file. The specific flaw exists in the generation of ActionScript exception handlers. In Verifier::parseExceptionHandlers(), a large value for exception_count will result in an integer overflow condition leading to a memory corruption which can be leveraged to execute arbitrary code under the context of the currently logged in user. -- Vendor Response: Adobe has issued an update to correct this vulnerability. More details can be found at: http://www.adobe.com/support/security/bulletins/apsb09-19.html -- Disclosure Timeline: 2008-10-15 - Vulnerability reported to vendor 2009-12-09 - Coordinated public release of advisory -- Credit: This vulnerability was discovered by: * Damian Put -- 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/