CVE-2021-3723 : Security Advisory and Response
Learn about CVE-2021-3723, a critical command injection vulnerability impacting IBM System x 3550 M3 and 3650 M3 servers. Explore its impact, affected systems, and mitigation steps.
A command injection vulnerability has been reported in the Integrated Management Module (IMM) of legacy IBM System x 3550 M3 and IBM System x 3650 M3 servers, potentially allowing the execution of operating system commands over an authenticated SSH or Telnet session.
Understanding CVE-2021-3723
This section provides detailed insights into the CVE-2021-3723 vulnerability.
What is CVE-2021-3723?
CVE-2021-3723 is a command injection vulnerability affecting legacy IBM System x 3550 M3 and IBM System x 3650 M3 servers. It allows attackers to execute operating system commands through authenticated SSH or Telnet sessions.
The Impact of CVE-2021-3723
With a CVSS base score of 7.2, this high-severity vulnerability can lead to significant risks, including the compromise of confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-3723
Explore the technical aspects related to CVE-2021-3723 below.
Vulnerability Description
The vulnerability in the IMM of affected IBM servers enables threat actors to run unauthorized commands on the system post-authentication through SSH or Telnet.
Affected Systems and Versions
Legacy IBM System x 3550 M3 and IBM System x 3650 M3 servers of all versions are susceptible to this command injection flaw.
Exploitation Mechanism
Attackers can exploit CVE-2021-3723 by sending malicious commands over authenticated SSH or Telnet connections, potentially gaining unauthorized access to the affected systems.
Mitigation and Prevention
Discover the necessary steps to mitigate the risks associated with CVE-2021-3723.
Immediate Steps to Take
- Lenovo recommends discontinuing the use of legacy IBM System x 3550 M3 and IBM System x 3650 M3 servers due to the identified vulnerability.
- Disable SSH and Telnet on the systems.
- Change the default Administrator password and enforce strong passwords.
- Limit access to trusted administrators only.
Long-Term Security Practices
Enforce regular security audits, implement network segmentation, and educate users on safe computing practices to enhance overall cybersecurity posture.
Patching and Updates
Stay informed about security patches and updates provided by Lenovo to address CVE-2021-3723 effectively.