Aug 2020: Netlogon Elevation of Privilege Vulnerability
CVE-2020-1472 Published on August 17, 2020
Netlogon Elevation of Privilege Vulnerability
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network.
To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access.
Microsoft is addressing the vulnerability in a phased two-part rollout. These updates address the vulnerability by modifying how Netlogon handles the usage of Netlogon secure channels.
For guidelines on how to manage the changes required for this vulnerability and more information on the phased rollout, see How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472 (updated September 28, 2020).
When the second phase of Windows updates become available in Q1 2021, customers will be notified via a revision to this security vulnerability. If you wish to be notified when these updates are released, we recommend that you register for the security notifications mailer to be alerted of content changes to this advisory. See Microsoft Technical Security Notifications.
Known Exploited Vulnerability
This NetLogon Privilege Escalation Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. A privilege escalation vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon Elevation of Privilege Vulnerability'.
The following remediation steps are recommended / required by September 21, 2020: Apply updates per vendor instructions.
Products Associated with CVE-2020-1472
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Affected Versions
Microsoft Windows Server version 2004:- Version 10.0.0 and below publication is affected.
- Version 10.0.0 and below publication is affected.
- Version 10.0.0 and below publication is affected.
- Version 10.0.0 and below publication is affected.
- Version 10.0.0 and below publication is affected.
- Version 10.0.0 and below publication is affected.
- Version 10.0.0 and below publication is affected.
- Version 6.1.0 and below publication is affected.
- Version 6.0.0 and below publication is affected.
- Version 6.2.0 and below publication is affected.
- Version 6.2.0 and below publication is affected.
- Version 6.3.0 and below publication is affected.
- Version 6.3.0 and below publication is affected.
- Version 10.0.0 and below publication is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.