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ZDI-10-142: Apple Webkit SVG First-Letter Style Remote Code Execution Vulnerability
From: ZDI Disclosures <zdi-disclosures () tippingpoint com>
Date: Thu, 5 Aug 2010 16:11:44 -0500
ZDI-10-142: Apple Webkit SVG First-Letter Style Remote Code Execution Vulnerabilityhttp://www.zerodayinitiative.com/advisories/ZDI-10-142August 5, 2010-- CVE ID:CVE-2010-1785-- CVSS:10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)-- Affected Vendors:Apple-- Affected Products:Apple WebKit-- TippingPoint(TM) IPS Customer Protection:TippingPoint IPS customers have been protected against thisvulnerability by Digital Vaccine protection filter ID 10065. For further product information on the TippingPoint IPS, visit:http://www.tippingpoint.com-- Vulnerability Details:This vulnerability allows remote attackers to execute arbitrary code onvulnerable installations of Apple Safari's Webkit. User interaction isrequired to exploit this vulnerability in that the target must visit amalicious page or open a malicious file.The specific flaw exists within the library's implementation of thefirst-letter style in the context of an SVG text element. Upon applyingthe style to this element, the library will calculate the height fordetermining the overflow for an inline box. While traversing theelements for the height, the library will utilize data from anon-existent linebox. Successful exploitation will lead to codeexecution under the context of the application.-- Vendor Response:Apple has issued an update to correct this vulnerability. Moredetails can be found at:http://support.apple.com/kb/HT4276-- Disclosure Timeline:2010-06-01 - Vulnerability reported to vendor2010-08-05 - Coordinated public release of advisory-- Credit:This vulnerability was discovered by: * wushi of team509-- 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 responsiblydisclosing discovered vulnerabilities.Researchers interested in getting paid for their security researchthrough the ZDI can find more information and sign-up at:http://www.zerodayinitiative.comThe ZDI is unique in how the acquired vulnerability information isused. TippingPoint does not re-sell the vulnerability details or anyexploit code. Instead, upon notifying the affected product vendor,TippingPoint provides its customers with zero day protection throughits intrusion prevention technology. Explicit details regarding thespecifics of the vulnerability are not exposed to any parties untilan official vendor patch is publicly available. Furthermore, with thealtruistic aim of helping to secure a broader user base, TippingPointprovides this vulnerability information confidentially to securityvendors (including competitors) who have a vulnerability protection ormitigation 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
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- ZDI-10-142: Apple Webkit SVG First-Letter Style Remote Code Execution VulnerabilityZDI Disclosures (Aug 06)