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.

Threat Intelligence

1/13/2021
05:00 PM
100%
0%

SolarWinds Attackers May Have Hit Mimecast, Driving New Concerns

Mimecast no longer uses the SolarWinds Orion network management software that served as an attack vector for thousands of organizations.

The discovery of a data breach at email service provider Mimecast could indicate attackers behind the massive SolarWinds incident may have pursued multiple paths to infiltrate target organizations, a new report states. 

Related Content:

SolarWinds Hack Lessons Learned: Finding the Next Supply Chain Attack

How Data Breaches Affect the Enterprise

New From The Edge: Understanding TCP/IP Stack Vulnerabilities in the IoT

Earlier this week, Mimecast confirmed an attacker had compromised a certificate provided to certain customers to authenticate Mimecast products to Microsoft 365 Exchange Web Services. The tools and techniques used in this attack link these operators to those who recently targeted SolarWinds, The Wall Street Journal reports.

The SolarWinds attack affected some 18,000 public and private organizations that downloaded infected versions of legitimate updates to its Orion network management software. However, the attack on Mimecast shows not all victims had to be SolarWinds customers to be targeted.

Mimecast was a SolarWinds customer in the past but no longer uses the Orion software, a person familiar with the matter told WSJ. The company has not determined how attackers got in or whether its earlier use of SolarWinds could have left it vulnerable. 

As security experts note, Mimecast digital certificates could enable attackers to read data stored on Microsoft Exchange servers. Mimecast says the incident affected about 10% of its customers. It's asking those who use this certificate-based connection to delete the existing connection in their Microsoft 365 tenant and establish a new certificate-based connection with a new certificate it has made available. 

Read the full report for more details.

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
Edge-DRsplash-10-edge-articles
7 Old IT Things Every New InfoSec Pro Should Know
Joan Goodchild, Staff Editor,  4/20/2021
News
Cloud-Native Businesses Struggle With Security
Robert Lemos, Contributing Writer,  5/6/2021
Commentary
Defending Against Web Scraping Attacks
Rob Simon, Principal Security Consultant at TrustedSec,  5/7/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
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-2020-20092
PUBLISHED: 2021-05-13
File Upload vulnerability exists in ArticleCMS 1.0 via the image upload feature at /admin by changing the Content-Type to image/jpeg and placing PHP code after the JPEG data, which could let a remote malicious user execute arbitrary PHP code.
CVE-2020-21342
PUBLISHED: 2021-05-13
Insecure permissions issue in zzcms 201910 via the reset any user password in /one/getpassword.php.
CVE-2020-25713
PUBLISHED: 2021-05-13
A malformed input file can lead to a segfault due to an out of bounds array access in raptor_xml_writer_start_element_common.
CVE-2020-27823
PUBLISHED: 2021-05-13
A flaw was found in OpenJPEG’s encoder. This flaw allows an attacker to pass specially crafted x,y offset input to OpenJPEG to use during encoding. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
CVE-2020-27830
PUBLISHED: 2021-05-13
A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.