Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Risk

3/3/2021
04:30 PM
50%
50%

CISA to Federal Agencies: Immediately Patch or 'Disconnect' Microsoft Exchange Servers

The US Department of Homeland Security agency's new emergency directive comes in the wake of major zero-day attacks on email servers revealed by Microsoft this week.

The US Department of Homeland Security's Cybersecurity and Infrastructure Security Agency (CISA) today issued an emergency directive calling for civilian federal agencies with on-premises Microsoft Exchange Servers to either update their software with newly released Microsoft patches or take the products offline until they can patch them.

ED-21-02 also calls for agencies to gather forensic images and, after patching, to look for known indicators of compromise in the wake of Microsoft's revelation that four zero-day flaws in Exchange are being abused by a nation-state group believed to be out of China. CISA also published technical details and indicators of compromise today.

Related Content:

Microsoft Fixes Exchange Server Zero-Days Exploited in Active Attacks

Special Report: How IT Security Organizations Are Attacking the Cybersecurity Problem

New From The Edge: Cybercrime 'Help Wanted': Job Hunting on the Dark Web

"This Emergency Directive will help us secure federal networks against the immediate threat while CISA works with its interagency partners to better understand the malicious actor’s techniques and motivations to share with our stakeholders," said Acting CISA Director Brandon Wales. "The swiftness with which CISA issued this Emergency Directive reflects the seriousness of this vulnerability and the importance of all organizations – in government and the private sector – to take steps to remediate it."

CISA said it worked with the National Security Agency, Microsoft, and security researchers to provide detection and mitigation steps for the threats. 

Read the full Emergency Directive (ED) 21-02.

 

Dark Reading's Quick Hits delivers a brief synopsis and summary of the significance of breaking news events. For more information from the original source of the news item, please follow the link provided in this article. View Full Bio
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
News
US Formally Attributes SolarWinds Attack to Russian Intelligence Agency
Jai Vijayan, Contributing Writer,  4/15/2021
News
Dependency Problems Increase for Open Source Components
Robert Lemos, Contributing Writer,  4/14/2021
News
FBI Operation Remotely Removes Web Shells From Exchange Servers
Kelly Sheridan, Staff Editor, Dark Reading,  4/14/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win an Amazon Gift Card! Click Here
Latest Comment: "Elon, I think our cover's been blown."
Current Issue
2021 Top Enterprise IT Trends
We've identified the key trends that are poised to impact the IT landscape in 2021. Find out why they're important and how they will affect you today!
Flash Poll
How Enterprises are Developing Secure Applications
How Enterprises are Developing Secure Applications
Recent breaches of third-party apps are driving many organizations to think harder about the security of their off-the-shelf software as they continue to move left in secure software development practices.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2021-31597
PUBLISHED: 2021-04-23
The xmlhttprequest-ssl package before 1.6.1 for Node.js disables SSL certificate validation by default, because rejectUnauthorized (when the property exists but is undefined) is considered to be false within the https.request function of Node.js. In other words, no certificate is ever rejected.
CVE-2021-2296
PUBLISHED: 2021-04-22
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.20. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromi...
CVE-2021-2297
PUBLISHED: 2021-04-22
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.20. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromi...
CVE-2021-2298
PUBLISHED: 2021-04-22
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.23 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attac...
CVE-2021-2299
PUBLISHED: 2021-04-22
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.23 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful atta...