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CVE-2023-44189

6.1 · MEDIUM

An Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10003 Series allows a network-adjacent attacker to bypass MAC address checking, allowing MAC…

Published Oct 11, 2023CWE-346EPSS 0.20%

Overview

CVE-2023-44189 is a medium-severity vulnerability. It was published on October 11, 2023 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

An Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10003 Series allows a network-adjacent attacker to bypass MAC address checking, allowing MAC addresses not intended to reach the adjacent LAN to be forwarded to the downstream network. Due to this issue, the router will start forwarding traffic if a valid route is present in forwarding-table, causing a loop and congestion in the downstream layer-2 domain connected to the device.

This issue affects Juniper Networks Junos OS Evolved on PTX10003 Series:

* All 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;

* 22.3 versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO;

* 22.4 versions prior to 22.4R2-S1-EVO, 22.4R3-EVO;

* 23.2 versions prior to 23.2R2-EVO.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refsupportportal.juniper.net/JSA73153Refsupportportal.juniper.net/JSA73153

How CyberStrike helps

Frequently asked questions

What is CVE-2023-44189?

CVE-2023-44189 is a medium-severity vulnerability. It was published on October 11, 2023 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2023-44189?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-44189?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-44189?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-44189 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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