Exploited vulnerability · CISA KEV

Is CVE-2020-1472 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Microsoft Netlogon · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-1472, Microsoft Netlogon Privilege Escalation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 443 days after it was published. It is known to be used in ransomware campaigns. It affects Microsoft Netlogon. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

Microsoft's Netlogon Remote Protocol (MS-NRPC) contains a privilege escalation vulnerability when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller. An attacker who successfully exploits the vulnerability could run a specially crafted application on a device on the network. The vulnerability is also known under the moniker of Zerologon.

What to do

1. Check whether you run it. Look for Netlogon in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 17 Aug 2020.
4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · Microsoft scorecard · act-now radar.