ZDI-12-187 : RealNetworks RealPlayer RV20 Frame Size Array Remote Code Execution Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-12-187 November 19, 2012 - -- CVE ID: CVE-2012-0923 - -- CVSS: 7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P - -- Affected Vendors: RealNetworks - -- Affected Products: RealNetworks RealPlayer - -- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealNetworks RealPlayer. 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 how the application parses a particular array contained within a Real Media file and then uses the data. When allocating and reading frame size information, the application will fail to check the bounds of how this array is used. The application will use results in this array as an allocation for the size of a buffer. When initializing this new buffer, the application can then write outside it's bounds which will lead to code execution under the context of the application. - -- Vendor Response: RealNetworks has issued an update to correct this vulnerability. More details can be found at: http://service.real.com/realplayer/security/09072012_player/en/ - -- Disclosure Timeline: 2011-10-21 - Vulnerability reported to vendor 2012-11-19 - Coordinated public release of advisory - -- Credit: This vulnerability was discovered by: * Luigi Auriemma - -- 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