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, accesses an uninitialized pointer during processing of Cascading Style Sheets (CSS) counter styles, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted web site.

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 perform a cast of an unspecified variable during processing of colors in an SVG document, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted web site.

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 perform a cast of an unspecified variable during processing of inline styling, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted web site.

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.

The JavaScript implementation in 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, uses a weak algorithm for generating values of random numbers, which makes it easier for remote attackers to track a user by predicting a value, a related issue to CVE-2008-5913 and CVE-2010-3171.

Integer overflow in 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, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted string.

Integer overflow in the Text::wholeText method in dom/Text.cpp in WebKit, as used 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; webkitgtk before 1.2.6; and possibly other products allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving Text objects.

Use-after-free vulnerability in 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, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving inline text boxes.

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 perform a cast of an unspecified variable during processing of Cascading Style Sheets (CSS) 3D transforms, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted web site.

Use-after-free vulnerability in WebKit in Apple Safari before 5.0 on Mac OS X 10.5 through 10.6 and Windows, Safari before 4.1 on Mac OS X 10.4, and Safari on Apple iPhone OS allows remote attackers to execute arbitrary code or cause a denial of service (application crash), or read the SMS database or other data, via vectors related to "attribute manipulation," as demonstrated by Vincenzo Iozzo and Ralf Philipp Weinmann during a Pwn2Own competition at CanSecWest 2010.