CVE-2018-8351 — Microsoft Browser Information Disclosure Vulnerability

Executive Summary

An information disclosure vulnerability exists when affected Microsoft browsers improperly allow cross-frame interaction. An attacker who successfully exploited this vulnerability could allow an attacker to obtain browser frame or window state from a different domain. For an attack to be successful, an attacker must persuade a user to open a malicious website from a secure website. This update addresses the vulnerability by denying permission to read the state of the object model, to which frames or windows on different domains should not have access.

Overview

4.3

CVSS MEDIUM

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

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

Low

INTEGRITY

None

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

16 affected products

Product	KB Article	Severity	Impact	Restart Required
Internet Explorer 10 on Windows Server 2012 4343901 (Monthly Rollup) 4343205 (IE Cumulative) Low Information Disclosure 4338830 4339093 Base: 2.4 Temporal: 2.2 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 10 for 32-bit Systems	`4343892 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 for x64-based Systems	`4343892 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems	`4343887 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems	`4343887 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems	`4343885 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems	`4343885 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems	`4343897 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems	`4343897 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems	`4343909 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems	`4343909 (Security Update)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 4343900 (Monthly Rollup) 4343205 (IE Cumulative) Important Information Disclosure 4338818 4339093 Base: 4.3 Temporal: 3.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 4343900 (Monthly Rollup) 4343205 (IE Cumulative) Important Information Disclosure 4338818 4339093 Base: 4.3 Temporal: 3.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 8.1 for 32-bit systems 4343898 (Monthly Rollup) 4343205 (IE Cumulative) Important Information Disclosure 4338815 4339093 Base: 4.3 Temporal: 3.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows 8.1 for x64-based systems 4343898 (Monthly Rollup) 4343205 (IE Cumulative) Important Information Disclosure 4338815 4339093 Base: 4.3 Temporal: 3.9 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows RT 8.1	`4343898 (Monthly Rollup)`	Important	Information Disclosure	Yes
Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4343900 (Monthly Rollup) 4343205 (IE Cumulative) Low Information Disclosure 4338818 4339093 Base: 2.4 Temporal: 2.2 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows Server 2012 R2 4343898 (Monthly Rollup) 4343205 (IE Cumulative) Low Information Disclosure 4338815 4339093 Base: 2.4 Temporal: 2.2 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C Yes None Internet Explorer 11 on Windows Server 2016	`4343887 (Security Update)`	Low	Information Disclosure	Yes
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 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

Patches

6 patches

Article	Type	Restart
`4343892`	Security Update	Yes
`4343887`	Security Update	Yes
`4343885`	Security Update	Yes
`4343897`	Security Update	Yes
`4343909`	Security Update	Yes
`4343898`	Monthly Rollup	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

Seonung Jang ( @Seonunghardt
Jun Kokatsu, Windows & Devices Group - Operating System Security Team
James Lee @Windowsrcer

References

MSRC Advisory MITRE NVD