CVE-2018-0890 — Active Directory Security Feature Bypass Vulnerability

Executive Summary

A security feature bypass vulnerability exists when Active Directory incorrectly applies Network Isolation settings. To exploit this vulnerability, an attacker could run a specially crafted application. An attacker who successfully exploited this vulnerability could bypass firewall policies applied to Modern Applications. This update corrects the security feature’s behavior by correcting how Active Directory manages Network Isolation policies applied to Modern Applications.

Overview

5.3

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

N/A

MS Exploit Likelihood

Category Security Feature Bypass

Released Apr 10 2018

Last Updated Apr 10 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Network

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

None

INTEGRITY

None

AVAILABILITY

High

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 4.8

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

9 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 Version 1607 for 32-bit Systems	`4093119 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1607 for x64-based Systems	`4093119 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1703 for 32-bit Systems	`4093107 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1703 for x64-based Systems	`4093107 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1709 for 32-bit Systems	`4093112 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1709 for x64-based Systems	`4093112 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2016	`4093119 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2016 (Server Core installation)	`4093119 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server, version 1709 (Server Core Installation)	`4093112 (Security Update)`	Important	Security Feature Bypass	Yes

Patches

3 patches

Article	Type	Restart
`4093119`	Security Update	Yes
`4093107`	Security Update	Yes
`4093112`	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