QID 730957

QID 730957: Juniper Network Operating System (Junos OS) MAC Address Validation Bypass Vulnerability (JSA73154)

Juniper Junos is the network operating system used in Juniper Networks hardware systems.

An Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10001, PTX10004, PTX10008, and PTX10016 devices 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.

This issue affects Juniper Networks Junos OS Evolved on PTX10001, PTX10004, PTX10008, and PTX10016: all versions prior to 21.4R3-S5-EVO; 22.1 versions prior to 22.1R3-S4-EVO; 22.2 versions 22.2R1-EVO and later; 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 23.2R1-S1-EVO, 23.2R2-EVO.

Successful exploitation of this vulnerability may enable the router to 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.

  • CVSS V3 rated as Medium - 5.4 severity.
  • CVSS V2 rated as Medium - 4.8 severity.
    • Solution
    Vendor has released patch addressing the vulnerabilities, for more information please refer JSA73154

    Vendor References

    CVEs related to QID 730957

    CVE-2023-44190 |
    Software Advisories
    Advisory ID Software Component Link
    JSA73154 URL Logo supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-Evolved-PTX10001-PTX10004-PTX10008-PTX10016-MAC-address-validation-bypass-vulnerability-CVE-2023-44190?language=en_US
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