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.

Vulnerabilities / Threats

3/9/2021
10:50 AM
50%
50%

Microsoft Pushes Patches for Older Versions of Exchange Server

Additional patches arrive as CISA issues an alert urging all organizations to immediately patch the Microsoft Exchange vulnerabilities.

Microsoft has deployed another series of Exchange Server security updates, which can be applied to some older and unsupported cumulative updates, to protect older versions of Exchange Server as attackers continue to scan for and exploit critical flaws patched last week. 

Related Content:

Microsoft Exchange Server Attack Escalation Prompts Patching Panic

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

New From The Edge: Realistic Patch Management Tips, Post-SolarWinds

The company has already issued emergency fixes for CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065 in Microsoft Exchange Server versions 2013, 2016, and 2019. Now, it's patching the same vulnerabilities in versions of Exchange Server it no longer supports.

In a blog post, Microsoft says these update packages only contain fixes for these four CVEs and do not include other product updates or security fixes. These updates are meant as a temporary measure to protect vulnerable machines; admins must still keep their environments current. Admins need to update to the latest supported cumulative update, then apply the necessary security update. Those who are midupdate to a later cumulative update should proceed with that update.

These updates are available only via Microsoft Download Center, not on Microsoft Update.

The same day Microsoft released these patches, the Department of Homeland Security's Cybersecurity & Infrastructure Security Agency (CISA) issued an alert urging "all organizations" to "immediately address" the Exchange Server flaws. Officials note the exploitation is "widespread and indiscriminate" and advise IT teams to follow the guidance on its "Remediating Microsoft Exchange Vulnerabilities" webpage.

Read more of Microsoft's guidance here and here.

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
Commentary
Ransomware Is Not the Problem
Adam Shostack, Consultant, Entrepreneur, Technologist, Game Designer,  6/9/2021
Edge-DRsplash-11-edge-ask-the-experts
How Can I Test the Security of My Home-Office Employees' Routers?
John Bock, Senior Research Scientist,  6/7/2021
News
New Ransomware Group Claiming Connection to REvil Gang Surfaces
Jai Vijayan, Contributing Writer,  6/10/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win an Amazon Gift Card! Click Here
Latest Comment: Zero Trust doesn't have to break your budget!
Current Issue
The State of Cybersecurity Incident Response
In this report learn how enterprises are building their incident response teams and processes, how they research potential compromises, how they respond to new breaches, and what tools and processes they use to remediate problems and improve their cyber defenses for the future.
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-2021-23396
PUBLISHED: 2021-06-17
All versions of package lutils are vulnerable to Prototype Pollution via the main (merge) function.
CVE-2021-32681
PUBLISHED: 2021-06-17
Wagtail is an open source content management system built on Django. A cross-site scripting vulnerability exists in versions 2.13-2.13.1, versions 2.12-2.12.4, and versions prior to 2.11.8. When the `{% include_block %}` template tag is used to output the value of a plain-text StreamField block (`Ch...
CVE-2013-20002
PUBLISHED: 2021-06-17
Elemin allows remote attackers to upload and execute arbitrary PHP code via the Themify framework (before 1.2.2) wp-content/themes/elemin/themify/themify-ajax.php file.
CVE-2020-19202
PUBLISHED: 2021-06-17
An authenticated Stored XSS (Cross-site Scripting) exists in the "captive.cgi" Captive Portal via the "Title of Login Page" text box or "TITLE" parameter in IPFire 2.21 (x86_64) - Core Update 130. It allows an authenticated WebGUI user with privileges for the affected p...
CVE-2020-35373
PUBLISHED: 2021-06-17
In Fiyo CMS 2.0.6.1, the 'tag' parameter results in an unauthenticated XSS attack.