SRC-2018-0025 : Microsoft Edge Undo Out-Of-Bounds Read Information Disclosure Vulnerability

CVE ID:

CVE-2018-1021

CVSS Score:

4.3, (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Vendors:

Microsoft

Affected Products:

Edge

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 undo functionality available to script. By manipulating a document’s elements, 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 code in the context of the current process.

Vendor Response:

Microsoft has issued an update to correct these vulnerabilities. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-1021

Disclosure Timeline:

• 2018-04-27 – Verified and acquired by iDefense
• 2018-07-13 – Coordinated public release of advisory

Credit:

This vulnerability was discovered by Steven Seeley (mr_me) of Source Incite

Acknowledgments:

Source Incite would like to acknowledge iDefense's Vulnerability Contributor Program for the help with co-ordination of this vulnerability.