Advisory Details

May 30th, 2013

Webkit.org Webkit string.replace Remote Code Execution Vulnerability

ZDI-13-109
ZDI-CAN-1517

CVE ID CVE-2013-0999
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS WebKit.Org
AFFECTED PRODUCTS WebKit
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 12949. 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 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 the way Webkit implements the string.replace() method. Due to insufficient boundary checks it is possible for specially crafted strings to cause an int wrap during the calculation of a buffer size. This could lead to a heap buffer overflow that could result in remote code execution under the context of the current user.

ADDITIONAL DETAILS WebKit.Org has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT1222
DISCLOSURE TIMELINE
  • 2012-11-21 - Vulnerability reported to vendor
  • 2013-05-30 - Coordinated public release of advisory
CREDIT pa_kt / twitter.com/pa_kt
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