Friday, March 29, 2024

Microsoft will Enable Domain Controller Enforcement Mode to Address Zerologon Flaw

In a post on 14th January 2021, Microsoft’s Aanchal Gupta, VP Engineering, published a post alerting network admins that an upcoming Windows Security Update will ensure that the Domain Controller enforcement mode will be enabled by default.

Vulnerability that was found

It was earlier identified that a malicious attacker by using the Netlogon Remote Protocol (MS-NRPC), could establish a vulnerable Netlogon secure channel connection to a domain controller. Once this vulnerability had been exploited, the threat actor could run a specially crafted application on a device on the network.

Benefit of the Security update

Once the update has been successfully completed, devices will connect only using the secure RPC with Netlogon secure channel, unless the customer has specifically added an exception for the non-compliant device thus making it vulnerable.

“We are reminding our customers that beginning with the February 9, 2021 Security Update release we will be enabling Domain Controller enforcement mode by default. This will block vulnerable connections from non-compliant devices,” Microsoft notes.

Things to do

To prepare, network admins need to:

  • UPDATE their Domain Controllers with an update released August 11, 2020 or later.
  • FIND which devices are making vulnerable connections by monitoring event logs.
  • ADDRESS non-compliant devices making vulnerable connections.
  • ENABLE Domain Controller enforcement mode to address CVE-2020-1472 in your environment

In preparation for the enforcement mode phase, organizations should apply the available patch to all domain controllers and should identify and resolve non-compliant devices to ensure they won’t make vulnerable connections.

Previous attacks

In the latter half of 2020, the Netlogon vulnerability CVE-2020-1472 was used by a group of hackers to attack several networks by using the Ryuk ransomware.

Website

Latest articles

GoPlus’s Latest Report Highlights How Blockchain Communities Are Leveraging Critical API Security Data To Mitigate Web3 Threats

GoPlus Labs, the leading Web3 security infrastructure provider, has unveiled a groundbreaking report highlighting...

Wireshark 4.2.4 Released: What’s New!

Wireshark stands as the undisputed leader, offering unparalleled tools for troubleshooting, analysis, development, and...

Zoom Unveils AI-Powered All-In-One AI Work Workplace

Zoom has taken a monumental leap forward by introducing Zoom Workplace, an all-encompassing AI-powered...

iPhone Users Beware! Darcula Phishing Service Attacking Via iMessage

Phishing allows hackers to exploit human vulnerabilities and trick users into revealing sensitive information...

2 Chrome Zero-Days Exploited at Pwn2Own 2024: Patch Now

Google has announced a crucial update to its Chrome browser, addressing several vulnerabilities, including...

The Moon Malware Hacked 6,000 ASUS Routers in 72hours to Use for Proxy

Black Lotus Labs discovered a multi-year campaign by TheMoon malware targeting vulnerable routers and...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Mitigating Vulnerability Types & 0-day Threats

Mitigating Vulnerability & 0-day Threats

Alert Fatigue that helps no one as security teams need to triage 100s of vulnerabilities.

  • The problem of vulnerability fatigue today
  • Difference between CVSS-specific vulnerability vs risk-based vulnerability
  • Evaluating vulnerabilities based on the business impact/risk
  • Automation to reduce alert fatigue and enhance security posture significantly

Related Articles