Active Directory Federation Services Elevation of Privilege Vulnerability

Source data

Overview

Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.

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.

CVSS base score

7.8 / 10

CVSS vector

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

• Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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)
• CISA Known Exploited Vulnerabilities (opens in a new tab)
• Authoritative advisory (opens in a new tab)
• Authoritative advisory (opens in a new tab)
• Authoritative advisory (opens in a new tab)
• NIST National Vulnerability Database (opens in a new tab)
• Authoritative advisory (opens in a new tab)