CVSS 3.1 Score 5.4 of 10 (medium)


Published Oct 11, 2023
Updated: Oct 19, 2023
CWE ID 346


CVE-2023-44189 is an Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10003 Series. This vulnerability allows a network-adjacent attacker to bypass MAC address checking, leading to the forwarding of MAC addresses not intended to reach the adjacent LAN to the downstream network. The affected products include several versions prior to 21.4R3-S4-EVO, 22.1 versions prior to 22.1R3-S3-EVO, 22.2 version 22.2R1-EVO and later versions, and more. The potential danger posed by this vulnerability is that the router will forward traffic if a valid route is present in the forwarding table, causing a loop and congestion in the downstream layer-2 domain connected to the device. To remediate this vulnerability, organizations should update their Juniper Networks Junos OS Evolved on PTX10003 Series devices to the recommended patched versions mentioned in the advisory.

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