CVE-2023-36836 Explained : Impact and Mitigation

A detailed overview of CVE-2023-36836 impacting Junos OS and Junos OS Evolved.

Understanding CVE-2023-36836

This section covers the vulnerability description, impact, affected systems, exploitation mechanism, and mitigation techniques.

What is CVE-2023-36836?

A vulnerability in the routing protocol daemon (rpd) allows a local, authenticated attacker to cause a Denial of Service (DoS) in Juniper Networks Junos OS and Junos OS Evolved.

The Impact of CVE-2023-36836

Executing a specific low privileged CLI command can crash the rpd process, affecting all routing protocols until the process restarts automatically.

Technical Details of CVE-2023-36836

Details on vulnerability description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

Affects Junos OS and Junos OS Evolved platforms where a specific CLI command leads to a sustained DoS.

Affected Systems and Versions

Junos OS versions 19.4R3-S5 to 22.2R2 and Junos OS Evolved versions prior to 22.2R2.

Exploitation Mechanism

The vulnerability is considered difficult to exploit as the operational state is outside the attacker's control.

Mitigation and Prevention

Tips on immediate steps, long-term security practices, and patching.

Immediate Steps to Take

Update to the patched software versions provided by Juniper Networks.

Long-Term Security Practices

Regularly apply security updates and monitor for any abnormal system behavior.

Patching and Updates

Software releases resolving the issue include Junos OS versions 19.4R3-S9 to 22.3R1 and Junos OS Evolved versions 20.4R3-S6-EVO to 22.3R1-EVO.