Advisory Details

March 16th, 2010

Apple WebKit CSS run-in Attribute Rendering Remote Code Execution Vulnerability

ZDI-10-030
ZDI-CAN-578

CVE ID CVE-2010-0053
CVSS SCORE 10.0, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Google
Apple
AFFECTED PRODUCTS Chrome
Safari
WebKit
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9597. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari and other WebKit based browsers. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists in the handling of the run-in value for display CSS styles. A specially crafted web page can cause a use after free() condition in WebKit's WebCore::RenderBlock() method. This can be further leveraged by attackers to execute arbitrary code under the context of the current user.

VENDOR RESPONSE Google states:


Apple has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT4070
DISCLOSURE TIMELINE
  • 2009-10-21 - Vulnerability reported to vendor
  • 2010-03-16 - Coordinated public release of advisory
CREDIT wushi of team509
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