CVE-2022-22205 : What You Need to Know

A Missing Release of Memory after Effective Lifetime vulnerability in the Application Quality of Experience (appqoe) subsystem of the PFE of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker to cause a Denial of Service (DoS). This article provides insights into the impact, technical details, and mitigation strategies for CVE-2022-22205.

Understanding CVE-2022-22205

This section delves into the details of the CVE-2022-22205 vulnerability.

What is CVE-2022-22205?

CVE-2022-22205 is a vulnerability in the Application Quality of Experience subsystem of Juniper Networks Junos OS on SRX Series that enables an unauthenticated attacker to trigger a DoS attack.

The Impact of CVE-2022-22205

The impact of CVE-2022-22205 is categorized as high, with a CVSS base score of 7.5. The vulnerability can lead to a memory leak in an APBR scenario, causing a halt in service operations and requiring manual intervention to recover.

Technical Details of CVE-2022-22205

This section provides technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises due to a missing memory release issue in the appqoe subsystem of PFE in Juniper Networks Junos OS. It affects specific versions of Junos OS on SRX Series devices.

Affected Systems and Versions

Junos OS versions prior to 20.3R1 are not vulnerable, while versions up to 21.3R2 are affected, with varying impacts.

Exploitation Mechanism

The vulnerability can be exploited by sending specific traffic to devices where advance(d) policy-based routing (APBR) is configured without AppQoE (sla rule) settings.

Mitigation and Prevention

Understanding how to mitigate and prevent CVE-2022-22205 is crucial in maintaining the security of Juniper Networks Junos OS devices.

Immediate Steps to Take

To address this vulnerability, update the affected Junos OS versions to 20.3R3-S2, 20.4R3-S2, 21.1R3, 21.2R2-S1, 21.2R3, 21.3R1-S2, 21.3R2, 21.4R1, or later releases.

Long-Term Security Practices

Implement best security practices by regularly updating Junos OS and configuring AppQoE rules for APBR scenarios to prevent memory leaks.

Patching and Updates

Stay informed about security patches and updates released by Juniper Networks to address vulnerabilities and enhance the security posture of SRX Series devices.