Advisory Details

November 10th, 2015

Microsoft Internet Explorer URLIMGCTX Use-After-Free Remote Code Execution Vulnerability

ZDI-15-540
ZDI-CAN-3113

CVE ID CVE-2015-6075
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 20637. 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 processes images specified using the CSS url() function. 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/library/security/MS15-112
DISCLOSURE TIMELINE
  • 2015-08-03 - Vulnerability reported to vendor
  • 2015-11-10 - Coordinated public release of advisory
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