CVE-2017-5255 : What You Need to Know

Cambium Networks ePMP firmware versions up to and including 3.5 are susceptible to a security flaw allowing authenticated users to execute OS commands with root-level privileges.

Understanding CVE-2017-5255

This CVE involves improper input sanitization in the web management console of Cambium Networks ePMP firmware, leading to OS command injection.

What is CVE-2017-5255?

Vulnerability in Cambium Networks ePMP firmware versions up to 3.5
Allows authenticated users to inject shell meta-characters via crafted POST requests
Enables execution of OS commands with root privileges

The Impact of CVE-2017-5255

Authenticated users, even with limited privileges, can exploit the vulnerability
Potential for unauthorized execution of commands with elevated privileges

Technical Details of CVE-2017-5255

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

Lack of input sanitation for specific parameters in the web management console
Allows injection of shell meta-characters in POST requests to the get_chart function
Results in the execution of OS-level commands as root

Affected Systems and Versions

Product: ePMP
Vendor: Cambium Networks
Vulnerable Versions: Up to and including 3.5

Exploitation Mechanism

Authenticated users exploit the flaw by injecting crafted POST requests
Specifically targets the get_chart function
Enables the execution of operating system commands with root-level privileges

Mitigation and Prevention

Protecting systems from CVE-2017-5255 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Cambium Networks ePMP firmware to a patched version
Monitor and restrict user access to minimize the risk of exploitation

Long-Term Security Practices

Regular security assessments and audits of web management consoles
Implement strict input validation mechanisms to prevent command injections

Patching and Updates

Apply security patches provided by Cambium Networks promptly
Stay informed about security advisories and updates from the vendor