CVE-2021-39291 Explained : Impact and Mitigation

Certain NetModule devices allow credentials via GET parameters to CLI-PHP. Learn about the impact, affected systems, and mitigation steps.

Understanding CVE-2021-39291

Certain NetModule devices are vulnerable to unauthorized access via CLI-PHP using GET parameters.

What is CVE-2021-39291?

Vulnerability in NetModule devices allowing credentials via GET parameters to CLI-PHP
Firmware versions before 4.3.0.113, 4.4.0.111, and 4.5.0.105 are affected
Specific models impacted include NB800, NB1600, NB1601, NB1800, and more

The Impact of CVE-2021-39291

Unauthorized access to CLI-PHP can lead to potential security breaches

Technical Details of CVE-2021-39291

NetModule devices' vulnerability details and exploitation methods.

Vulnerability Description

Vulnerability allows attackers to obtain credentials via GET parameters

Affected Systems and Versions

Devices with firmware versions before 4.3.0.113, 4.4.0.111, and 4.5.0.105
Models include NB800, NB1600, NB1601, NB1800, and more

Exploitation Mechanism

Attackers exploit GET parameters to gain unauthorized access to CLI-PHP

Mitigation and Prevention

Steps to mitigate the CVE-2021-39291 vulnerability.

Immediate Steps to Take

Update affected devices to firmware versions 4.3.0.113, 4.4.0.111, or 4.5.0.105
Implement strong password policies for CLI access

Long-Term Security Practices

Regularly monitor device logs for suspicious activities
Conduct security audits to identify and address vulnerabilities

Patching and Updates

Stay informed about firmware updates from NetModule
Apply patches promptly to prevent exploitation of known vulnerabilities