OnlyPatch
Internet Explorer

CVE-2018-8470 — Internet Explorer Security Feature Bypass Vulnerability

Important CVSS 4.3 2018-09 archive

Executive Summary

A security feature bypass vulnerability exists in Internet Explorer due to how scripts are handled that allows a universal cross-site scripting (UXSS) condition. An attacker could use the UXSS vulnerability to access any session belonging to web pages currently opened (or cached) by the browser at the time the attack is triggered. To exploit the UXSS vulnerability, a user must be logged on and running an affected version of Internet Explorer. The user would then need to browse to a malicious website or a website serving the malicious code. The security update addresses the UXSS vulnerability by helping to ensure that Internet Explorer properly handles scripts.

Overview

4.3
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Security Feature Bypass
Released Sep 11 2018
Last Updated Sep 11 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

12 affected products
Product KB Article Severity Impact Restart Required
Internet Explorer 11 on Windows 10 for 32-bit Systems 4457132 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 for x64-based Systems 4457132 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems 4457131 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems 4457131 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems 4457138 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems 4457138 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems 4457142 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems 4457142 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems 4457128 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems 4457128 (Security Update) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 4457144 (Monthly Rollup) 4457426 (IE Cumulative) Important Security Feature Bypass 4343900 4343205 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 4457144 (Monthly Rollup) 4457426 (IE Cumulative) Important Security Feature Bypass 4343900 4343205 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 4457426 (IE Cumulative) 4457129 (Monthly Rollup) Important Security Feature Bypass 4343205 4343898 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 4457426 (IE Cumulative) 4457129 (Monthly Rollup) Important Security Feature Bypass 4343205 4343898 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 4457129 (Monthly Rollup) Important Security Feature Bypass Yes
Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4457144 (Monthly Rollup) 4457426 (IE Cumulative) Low Security Feature Bypass 4343900 4343205 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 4457426 (IE Cumulative) 4457129 (Monthly Rollup) Low Security Feature Bypass 4343205 4343898 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 4457131 (Security Update) Low Security Feature Bypass Yes

Patches

6 patches
Article Type Restart
4457132 Security Update Yes
4457131 Security Update Yes
4457138 Security Update Yes
4457142 Security Update Yes
4457128 Security Update Yes
4457129 Monthly Rollup Yes

Known Exploits

Acknowledgments

Masato Kinugawa

On This Page