TippingPoint Zero Day Initiative
 

Microsoft Edge Undo Command Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-17-725: September 12th, 2017

CVE ID

CVSS Score

Affected Vendors

Affected Products

    Edge

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 28919. For further product information on the TippingPoint IPS:

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 implementation of the Undo command in HTML documents. By performing actions in JavaScript an attacker can trigger a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the process.

Vendor Response

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

Disclosure Timeline

    2017-06-12 - Vulnerability reported to vendor
    2017-09-12 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    0011