CVE-2021-44225 : What You Need to Know

Keepalived through 2.2.4 allows an access-control bypass via insufficiently restricted D-Bus policy, enabling users to manipulate properties.

Understanding CVE-2021-44225

What is CVE-2021-44225?

Keepalived through version 2.2.4 suffers from a vulnerability where the D-Bus policy lacks adequate restrictions, permitting unauthorized users to inspect and modify properties, leading to an access-control bypass.

The Impact of CVE-2021-44225

This vulnerability allows any user to access and change properties, possibly resulting in unauthorized actions and system compromise.

Technical Details of CVE-2021-44225

Vulnerability Description

The issue arises from insufficiently restricted D-Bus policy, enabling users to bypass access control and interact with properties not meant for their access.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions up to 2.2.4 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability's exploitation involves manipulating D-Bus properties to carry out unauthorized actions.

Mitigation and Prevention

Immediate Steps to Take

Update Keepalived to version 2.2.5 or later, which contains a fix for this vulnerability.
Monitor system logs for any unusual activity that might indicate unauthorized access.

Long-Term Security Practices

Regularly review and update access control policies and configurations.
Conduct periodic security audits to detect and address vulnerabilities proactively.
Educate system administrators and users on secure practices to prevent unauthorized access.

Patching and Updates

Ensure timely installation of security patches and updates provided by Keepalived to address known vulnerabilities.