The Cybersecurity and Infrastructure Security Agency (CISA) has released Emergency Directive (ED) 20-04 addressing a critical vulnerability— CVE-2020-1472—affecting Microsoft Windows Netlogon Remote Protocol. An unauthenticated attacker with network access to a domain controller could exploit this vulnerability to compromise all Active Directory identity services.
Earlier this month, exploit code for this vulnerability was publicly released. Given the nature of the exploit and documented adversary behaviour, CISA assumes active exploitation of this vulnerability is occurring in the wild.
ED 20-04 applies to Executive Branch departments and agencies; however, CISA strongly recommends state and local governments, the private sector, and others patch this critical vulnerability as soon as possible. Review the following resources for more information:
- CISA Emergency Directive 20-04: Mitigate Netlogon Elevation of Privilege Vulnerability from August 2020 Patch Tuesday
- CERT/CC Vulnerability Note [VU#490028]
- Microsoft Security Vulnerability Information for CVE-2020-1472
- Microsoft’s guidance on How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472
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