CVE-2020-25654 : Exploit Details and Defense Strategies

An ACL bypass flaw in pacemaker allows local attackers to perform unauthorized tasks.

Understanding CVE-2020-25654

An ACL bypass vulnerability in pacemaker could be exploited by local attackers to bypass restrictions.

What is CVE-2020-25654?

This CVE refers to an ACL bypass flaw in pacemaker that enables attackers with local accounts to perform tasks they are restricted from doing through configuration.

The Impact of CVE-2020-25654

The vulnerability allows attackers in the haclient group to use IPC communication with daemons to execute unauthorized actions.

Technical Details of CVE-2020-25654

Vulnerability Description

An ACL bypass flaw in pacemaker permits local attackers to bypass ACL restrictions by directly communicating with daemons.

Affected Systems and Versions

Vendor: n/a
Product: pacemaker
Versions: pacemaker 1.1.24-rc1, pacemaker 2.0.5-rc2

Exploitation Mechanism

Attackers with local accounts in the haclient group can exploit IPC communication with daemons to perform unauthorized tasks.

Mitigation and Prevention

Immediate Steps to Take

Apply the vendor-provided security updates promptly.
Restrict access to vulnerable systems to trusted users only.

Long-Term Security Practices

Regularly monitor and audit system logs for unusual activities.
Implement the principle of least privilege to limit user access.
Conduct security training for users on best practices to prevent unauthorized access.

Patching and Updates

Update pacemaker to the latest patched version to mitigate the ACL bypass vulnerability.