-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ZDI-11-289 : Microsoft Internet Explorer swapNode Handling Remote Code Execution Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-11-289 October 15, 2011 - -- CVE ID: CVE-2011-2000 - -- CVSS: 7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P - -- Affected Vendors: Microsoft - -- Affected Products: Microsoft Internet Explorer - -- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability by Digital Vaccine protection filter ID 11760. 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 Microsoft Internet Explorer. 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 the way Internet Explorer handles calls to the method swapNode(). When a call to swapNode is issued on an node within a document that has two body nodes, Internet Explorer frees an attribute field for one of the body nodes and then later re-uses the freed field during the node swap. This behavior could result in remote code execution under the context of the current user. - -- 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/ms11-081 - -- Disclosure Timeline: 2011-07-20 - Vulnerability reported to vendor 2011-10-15 - Coordinated public release of advisory - -- Credit: This vulnerability was discovered by: * Sebastian Apelt (www.siberas.de) - -- 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: GnuPG v1.4.9 (Cygwin) iQEcBAEBAgAGBQJOnFteAAoJEFVtgMGTo1sceCIH/0QsXr3LLNObUragZ1iPOOTC lDqvEOlba2oN9yTKciOcGrm3z9K9DumCchYMkTAhNHcsbAyc22ffAgyfTwStnQNx jCiFcigafEwUvP9S7eASJuiHkfv6/bIXg05Jlz7EKBNXpigN7aJTu1B0WWo94HNX YxAcaUN3M7LZrbXEUgbt72Ms3HkGJYjHHSTJeIBLrLp9k/QmaU1Us8K0bR2Ob6KN nLz1oHsgLU+e2pVjJ18A9ztp0qpGm8bsEScm6I/p5bUUpO4jApO6ahGgwdrH+nij QlRr6C9NmxUAOKSncASk+kldlt6FhhwcWx0pxVl1al847jAjGXVpCxu31f0lIZs= =T77+ -----END PGP SIGNATURE-----
