TippingPoint Zero Day Initiative
 

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

ZDI-17-169: March 21st, 2017

CVE ID

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 25485. For further product information on the TippingPoint IPS:

Vulnerability Details


This vulnerability allows remote attackers to disclose sensitive information 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 specific flaw exists within the processing of HTML tags. By manipulating a document's elements an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to disclose sensitive information under the context of the current process.

Vendor Response

Microsoft has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2016-10-06 - Vulnerability reported to vendor
    2017-03-21 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Kai Song(exp-sky) of Tencent's Xuanwu Lab