Advisory Details

October 13th, 2015

Microsoft Internet Explorer empty-cells Use-After-Free Remote Code Execution Vulnerability

ZDI-15-523
ZDI-CAN-3119

CVE ID CVE-2015-6045
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 20734. 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 performs layout of table cells when the CSS empty-cells property is specified. By manipulating a document's elements an attacker can force a CElement-derived 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/MS15-106
DISCLOSURE TIMELINE
  • 2015-08-21 - Vulnerability reported to vendor
  • 2015-10-13 - Coordinated public release of advisory
CREDIT Zheng Huang of Baidu Scloud XTeam
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