Apple Webkit CSS Charset Text Transformation Remote Code Execution VulnerabilityZDI-10-093: June 8th, 2010
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9858. For further product information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari's Webkit. 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 Webkit's support of character sets. If the IBM1147 character set is applied to a particular element and that element has a text transformation applied to it, the application will attempt to access an object that doesn't exist in order to perform the transformation. Successful exploitation will lead to code execution under the context of the web-browser.
Vendor ResponseApple has issued an update to correct this vulnerability. More details can be found at:
2010-05-03 - Vulnerability reported to vendor
2010-06-08 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
wushi of team509