CVE-2018-8564 — Microsoft Edge Spoofing Vulnerability

Executive Summary

A spoofing vulnerability exists when Microsoft Edge improperly handles specific HTML content. An attacker who successfully exploited this vulnerability could trick a user into believing that the user was on a legitimate website. The specially crafted website could either spoof content or serve as a pivot to chain an attack with other vulnerabilities in web services. To exploit the vulnerability, the user must either browse to a malicious website or be redirected to it. In an email attack scenario, an attacker could send an email message in an attempt to convince the user to click a link to a malicious site. In a web-based attack scenario, an attacker could host a specially crafted website designed to appear as a legitimate website to the user. However, the attacker would have no way to force the user to visit the specially crafted website. The attacker would have to convince the user to visit the specially crafted website, typically by way of enticement in an email or instant message. The security update addresses the vulnerability by correcting how Microsoft Edge handles specific HTML content.

Overview

4.3

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

More Likely

MS Exploit Likelihood

Category Spoofing

Released Nov 13 2018

Last Updated Nov 13 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

None

INTEGRITY

Low

AVAILABILITY

None

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 3.9

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

17 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems	`4467680 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems	`4467680 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems	`4467691 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems	`4467691 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems	`4467696 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems	`4467696 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems	`4467686 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems	`4467686 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems	`4467686 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems	`4467702 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems	`4467702 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems	`4467702 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems	`4467708 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems	`4467708 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems	`4467708 (Security Update)`	Important	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows Server 2016	`4467691 (Security Update)`	Low	Spoofing	Yes
Microsoft Edge (EdgeHTML-based) on Windows Server 2019	`4467708 (Security Update)`	Low	Spoofing	Yes

Patches

6 patches

Article	Type	Restart
`4467680`	Security Update	Yes
`4467691`	Security Update	Yes
`4467696`	Security Update	Yes
`4467686`	Security Update	Yes
`4467702`	Security Update	Yes
`4467708`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Jun Kokatsu, Windows & Devices Group - Operating System Security Team

References

MSRC Advisory MITRE NVD