CVE-2022-22170 : What You Need to Know

A detailed article outlining the vulnerability in Juniper Networks Junos OS that allows an unauthenticated networked attacker to cause a Denial of Service (DoS) by sending specific packets over VXLAN.

Understanding CVE-2022-22170

This CVE describes a Missing Release of Resource after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS.

What is CVE-2022-22170?

A Missing Release of Resource after Effective Lifetime vulnerability in Juniper Networks Junos OS allows an unauthenticated networked attacker to cause a Denial of Service (DoS) by sending specific packets over VXLAN.

The Impact of CVE-2022-22170

The vulnerability can lead to a Denial of Service (DoS) attack by causing heap memory to leak and potentially reset the PFE on exhaustion.

Technical Details of CVE-2022-22170

This section covers the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in Juniper Networks Junos OS allows an attacker to cause a DoS by sending specific packets over VXLAN, resulting in heap memory leakage.

Affected Systems and Versions

Junos OS versions affected include 19.4 up to 21.2, with specific versions detailed in the configurations section.

Exploitation Mechanism

To exploit this issue, an attacker needs to send specific packets over VXLAN to trigger heap memory leakage and potential PFE reset.

Mitigation and Prevention

Learn about immediate steps to take, long-term security practices, and patching information.

Immediate Steps to Take

Implement the provided Junos OS software releases to resolve the vulnerability and protect systems.

Long-Term Security Practices

Regularly update Junos OS to the latest patched versions to prevent such vulnerabilities.

Patching and Updates

Ensure that the Junos OS software is updated to versions 19.4R2-S6, 19.4R3-S6, 20.1R3-S2, 20.2R3-S3, 20.3R3-S1, 20.4R3, 21.1R3, 21.2R2, 21.3R1, or subsequent releases.