CVE-2018-12551 Explained : Impact and Mitigation

Eclipse Mosquitto versions 1.0 through 1.5.5 are affected by a vulnerability that allows unauthorized access to the broker when utilizing a password file for authentication.

Understanding CVE-2018-12551

This CVE involves a security flaw in Eclipse Mosquitto versions 1.0 to 1.5.5 that can be exploited to bypass authentication mechanisms.

What is CVE-2018-12551?

If incorrect data is present in the password file used for authentication, it will be recognized as a valid username with no password, enabling clients to gain unauthorized access to the broker.

The Impact of CVE-2018-12551

This vulnerability allows clients to bypass authentication and access the broker by using incorrect usernames, potentially compromising the security of the system.

Technical Details of CVE-2018-12551

Eclipse Mosquitto versions 1.0 to 1.5.5 are susceptible to unauthorized access due to mishandling of data in the password file.

Vulnerability Description

The flaw allows incorrect data in the password file to be acknowledged as valid usernames with no password, enabling unauthorized access to the broker.

Affected Systems and Versions

Product: Eclipse Mosquitto
Vendor: The Eclipse Foundation
Versions: 1.0, 1.5.5, and prior versions

Exploitation Mechanism

Clients can exploit the vulnerability by using incorrect data in the password file to gain unauthorized access to the broker.

Mitigation and Prevention

To address CVE-2018-12551, users should take immediate steps and implement long-term security practices.

Immediate Steps to Take

Update to a patched version of Eclipse Mosquitto that addresses the vulnerability.
Avoid using password files for authentication until the issue is resolved.

Long-Term Security Practices

Regularly monitor for security updates and apply patches promptly.
Implement multi-factor authentication to enhance security.

Patching and Updates

Stay informed about security advisories from Eclipse and promptly apply any patches released to address vulnerabilities.