Oracle addresses over 250 CVEs in its second quarterly update of 2021 with 390 patches, including 34 critical updates.

Oracle April 2021 Critical Patch Update Addresses 257 CVEs including ‘Zerologon’ (CVE-2020-1472)

Zerologon has quickly become valuable to nation-state threat actors and ransomware gangs, making it imperative for organizations to apply these patches immediately if they have not yet done so. Background On February 9, as part of its February 2021 Patch Tuesday release, Microsoft released an additional patch for Zerologon to enable a security setting by default to protect vulnerable systems.

CVE-2020-1472: Microsoft Finalizes Patch for Zerologon to Enable Enforcement Mode by Default

U.S. Government agencies issue joint cybersecurity advisory cautioning that advanced threat groups are chaining vulnerabilities together to gain entry into government networks and elevate privileges. Update October 13, 2020: The Identifying affected systems section has been updated to include details about the availability of a Zerologon scan template for Tenable.io, Tenable.sc and Nessus.

CVE-2020-1472: Advanced Persistent Threat Actors Use Zerologon Vulnerability In Exploit Chain with Unpatched Vulnerabilities

Security researchers reveal how the cryptographic authentication scheme in Netlogon can be exploited to take control of a Windows domain controller (DC). Update: September 21, 2020: The ‘Identifying Affected Systems’ section has been updated to include instructions for our new unauthenticated check for Zerologon. Update: October 02, 2020: The ‘Identifying Affected Systems’ section has been updated to highlight the release of the Zerologon scan template for Nessus and Tenable.io.

CVE-2020-1472: 'Zerologon' Vulnerability in Netlogon Could Allow Attackers to Hijack Windows Domain Controller

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.

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CVE-2020-1472

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