-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ZDI-12-141 : Microsoft .NET Framework Clipboard Unsafe Memory Access Remote Code Execution Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-12-141 August 17, 2012 - -- CVE ID: CVE-2012-1855 - -- CVSS: 7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P - -- Affected Vendors: Microsoft - -- Affected Products: Microsoft .NET - -- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of the .NET Framework. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The flaw exists within Microsoft .NET XAML Browser Application (XBAP) handling of Clipboard object data. It is possible to cause unsafe memory access within System.Windows.Forms.Clipboard, allowing an attacker to control the memory used by an object's native code. This unsafe access allows for control of a function pointer, which can be exploited to remotely execute code. In the case of Internet Explorer, execution of attacker code occurs outside of the Protected Mode sandbox. - -- Vendor Response: Microsoft has issued an update to correct this vulnerability. More details can be found at: http://technet.microsoft.com/en-us/security/bulletin/ms12-038 - -- Disclosure Timeline: 2012-01-12 - Vulnerability reported to vendor 2012-08-17 - Coordinated public release of advisory - -- Credit: This vulnerability was discovered by: * Vitaliy Toropov - -- 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 wsBVAwUBUC5lTVVtgMGTo1scAQJQZgf/UA2bBcKNlJ/F1WN4HZ3/c9Qv/TJBSB5M h26DGtCuXtoKdb1l5pgyBQiuTY0rtbwQ5lUQvLooDifC+W6TVQOF+x3bqKpi4fcY LoJPgojumYsjesEdj46pVfATyFLHESpVULjL7eLyZqVLdoxp/k72G/zbk4ISzNHd C0kCYV0cVlq7S/xIE4fl6CXuEaHl09ymBVSnJBAeTuGtZaypu9ElOjSGUmnQ+Utv j/Q02w91hxPxo3cgnNc7isLzWbfA4Umcs0Q2Y019PYeSJyyhgXzSMxWYlvx685Zs cM6G/VALPUSDZ9i5Tr2PZwobkQIqsSmyVa5f3yWcoaRMlB9NJhTJBA== =IRHW -----END PGP SIGNATURE-----
