Advisory Details

June 8th, 2009

Apple WebKit attr() Invalid Attribute Memory Corruption Vulnerability

ZDI-09-032
ZDI-CAN-441

CVE ID CVE-2009-1698
CVSS SCORE
AFFECTED VENDORS Apple
AFFECTED PRODUCTS Safari
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8043. 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 WebKit. 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 attr() functions in a CSS content object. When a large numerical value is passed as the argument to the attr() function, a memory corruption will occur which can be leveraged to execute arbitrary coder under the context of the current user.

ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT3613
DISCLOSURE TIMELINE
  • 2009-03-26 - Vulnerability reported to vendor
  • 2009-06-08 - Coordinated public release of advisory
CREDIT Thierry Zoller
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