CVE-2018-8370 — Microsoft Edge Information Disclosure Vulnerability

Executive Summary

A information disclosure vulnerability exists when WebAudio Library improperly handles audio requests. An attacker who has successfully exploited this vulnerability might be able to read privileged data across trust boundaries. In browsing scenarios, an attacker could convince a user to visit a malicious site and leverage the vulnerability to obtain privileged information from the browser process, such as sensitive data from other opened tabs. An attacker could also inject malicious code into advertising networks used by trusted sites or embed malicious code on a compromised, but trusted, site. The update addresses the vulnerability by correcting how the WebAudio Library handles audio requests.

Overview

3.1

CVSS LOW

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Information Disclosure

Released Aug 14 2018

Last Updated Aug 14 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Network

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

Low

INTEGRITY

None

AVAILABILITY

None

Temporal Score: 3.1

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

11 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems	`4343892 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems	`4343892 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems	`4343887 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems	`4343887 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems	`4343885 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems	`4343885 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems	`4343897 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems	`4343897 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems	`4343909 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems	`4343909 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows Server 2016	`4343887 (Security Update)`	Low	Information Disclosure	Yes

Patches

5 patches

Article	Type	Restart
`4343892`	Security Update	Yes
`4343887`	Security Update	Yes
`4343885`	Security Update	Yes
`4343897`	Security Update	Yes
`4343909`	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

None

References

MSRC Advisory MITRE NVD