CVE-2023-44181 Explained : Impact and Mitigation

A detailed look into CVE-2023-44181 impacting Juniper Networks Junos OS QFX5k devices and the vulnerability associated with an improperly implemented security check for standard vulnerability.

Understanding CVE-2023-44181

This CVE affects Juniper Networks Junos OS QFX5k devices, causing a l2 loop in the overlay that impacts the stability in an EVPN/VXLAN environment.

What is CVE-2023-44181?

An improperly implemented security check for standard vulnerability in the storm control of Juniper Networks Junos OS QFX5k devices allows packets to be punted to the ARP queue, leading to a l2 loop resulting in DDOS violations and DDOS syslog.

The Impact of CVE-2023-44181

This issue is triggered when Storm control is enabled and ICMPv6 packets are present on the device. It affects various versions of Junos OS prior to 22.2R2 on QFX5k platforms.

Technical Details of CVE-2023-44181

Vulnerability Description

The vulnerability allows malicious exploitation leading to a l2 loop in the overlay, impacting the stability in an EVPN/VXLAN environment.

Affected Systems and Versions

Juniper Networks Junos OS QFX5k devices are affected prior to version 22.2R2.

Exploitation Mechanism

Juniper SIRT has not observed any malicious exploitation of this vulnerability.

Mitigation and Prevention

Immediate Steps to Take

Disable storm control configuration on affected devices to mitigate the vulnerability.

Long-Term Security Practices

Ensure timely software updates and follow Juniper's recommendations to enhance security.

Patching and Updates

Juniper has released updated software versions including Junos OS 20.2R3-S6, 20.3R3-S5, 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3-S2, 21.4R3, 22.1R3, 22.2R2, 22.3R1, and subsequent releases to address the vulnerability.