Advisory Details

February 1st, 2013

(Mobile Pwn2Own) Apple Safari shiftCount/splice Remote Code Execution Vulnerability

ZDI-13-009
ZDI-CAN-1657

CVE ID CVE-2012-3748
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Apple
Apple
AFFECTED PRODUCTS iPhone
Safari
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 12482. 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. 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 the handling of Array objects. When splicing a sparse array, the size of a sparse array is not properly validated. In addition, parameters checked at the beginning of a function are never again validated despite being modified later on. By abusing this behavior an attacker can ensure this memory is under control and leverage the situation to achieve remote code execution.

ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT5567
Apple has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT5567
DISCLOSURE TIMELINE
  • 2012-09-02 - Vulnerability reported to vendor
  • 2013-02-01 - Coordinated public release of advisory
CREDIT Joost Pol and Daan Keuper of Certified Secure
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