Arbitrary Code Execution and Denial of Service Vulnerability in WebKit

CVE-2010-3821 · HIGH Severity

AV:N/AC:M/AU:N/C:C/I:C/A:C

WebKit in Apple Safari before 5.0.3 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1.3 on Mac OS X 10.4, does not properly handle the :first-letter pseudo-element in a Cascading Style Sheets (CSS) token sequence, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.

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