CVE-2020-7240 : What You Need to Know
Learn about CVE-2020-7240 affecting Meinberg Lantime M300 and M1000 devices. Understand the impact, technical details, and mitigation steps for this OS command execution vulnerability.
Meinberg Lantime M300 and M1000 devices have a vulnerability that allows attackers to execute arbitrary OS commands by editing a specific script. The vulnerability requires a fully authenticated super-user account using a webUI function.
Understanding CVE-2020-7240
This CVE involves a security issue in Meinberg Lantime M300 and M1000 devices that can be exploited by attackers with privileges to configure the device.
What is CVE-2020-7240?
The vulnerability allows attackers to execute arbitrary OS commands by editing the /config/netconf.cmd script, also known as Extended Network Configuration. It requires a fully authenticated super-user account using a webUI function that permits super users to edit a script meant to execute OS commands. The weakness enumeration (CWE-78) is not applicable in this case as it involves abusing functions/input fields not intended to accept OS commands.
The Impact of CVE-2020-7240
The vulnerability can lead to unauthorized execution of OS commands on affected devices, potentially resulting in system compromise and unauthorized access to sensitive information.
Technical Details of CVE-2020-7240
Meinberg Lantime M300 and M1000 devices are susceptible to the following:
Vulnerability Description
Attackers can exploit the vulnerability by manipulating the /config/netconf.cmd script to execute arbitrary OS commands, posing a significant security risk.
Affected Systems and Versions
- Product: Meinberg Lantime M300 and M1000
- Version: Not applicable
Exploitation Mechanism
The vulnerability requires attackers to have privileges to configure the device and a fully authenticated super-user account using a specific webUI function.
Mitigation and Prevention
To address CVE-2020-7240, consider the following steps:
Immediate Steps to Take
- Restrict access to the webUI function that allows editing of scripts to authorized personnel only.
- Regularly monitor and review configurations for unauthorized changes.
Long-Term Security Practices
- Implement the principle of least privilege to limit user access rights.
- Conduct regular security training for personnel to raise awareness of potential threats.
Patching and Updates
- Apply security patches and updates provided by Meinberg to address the vulnerability and enhance device security.