TippingPoint Zero Day Initiative

Microsoft Edge CTransitionValues Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-17-167: March 21st, 2017


CVSS Score

Affected Vendors

Affected Products


Vulnerability Details

This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Edge. 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 the filter attribute in CSS. By manipulating a document's elements an attacker can trigger a read past the end of an allocated data structure. An attacker could leverage this in conjunction with other vulnerabilities to execute arbitrary code in 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

    2016-09-08 - Vulnerability reported to vendor
    2017-03-21 - Coordinated public release of advisory


This vulnerability was discovered by: