Active Directory Certificate Services Elevation of Privilege Vulnerability

Source data

Overview

Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.

Impact & technical details

Elevation of Privilege

What privileges could be gained by an attacker who successfully exploited the vulnerability? An attacker who successfully exploited this vulnerability could gain administrator privileges.

How could an attacker exploit this vulnerability? An authenticated attacker could manipulate attributes associated with a machine account and obtain a certificate from Active Directory Certificate Services that allows authentication as that machine via PKINIT. If a Domain Controller account can be targeted, the attacker could authenticate as the Domain Controller and gain the ability to perform privileged Active Directory operations.

CVSS base score

8.8 / 10

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Highest base score supplied by MSRC for this record; the vector belongs to that score. Ratings can vary by product. Microsoft Important is displayed as High; Moderate is displayed as Medium.

Affected products

• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)

Source guidance

Remediation

The source provides update references without a separate remediation summary. Review the applicable update links below.

At least one Microsoft vendor-fix reference is available. Check each affected product for its applicable update, prerequisites, and supported version.

Authoritative sources & updates

Findings and update information come from the linked publishers. GTP compiles the public record and provides the recommendation above. CVSS ratings shown here come from Microsoft. NVD references provide additional public context.

• Microsoft Security Response Center (opens in a new tab)
• Microsoft security update · 5099538 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5099540 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5099536 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5099535 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5099445 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)
• Microsoft security update · 5099444 (opens in a new tab)
• Microsoft remediation guidance (opens in a new tab)