Advisory Details

December 8th, 2015

Microsoft Internet Explorer Mutation Observer Use-After-Free Remote Code Execution Vulnerability

ZDI-15-582
ZDI-CAN-3124

CVE ID CVE-2015-6160
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 20735. 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 Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The vulnerability relates to how Internet Explorer notifies Mutation Observers of modifications to a document's character data. By manipulating a document's elements an attacker can force a CTreePos object in memory to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/en-us/library/security/ms15-124.aspx
DISCLOSURE TIMELINE
  • 2015-08-21 - Vulnerability reported to vendor
  • 2015-12-08 - Coordinated public release of advisory
CREDIT Garage4Hackers
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