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Medium severity6.1NVD Advisory· Published Oct 11, 2023· Updated Jun 17, 2026

CVE-2023-44190

CVE-2023-44190

Description

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. 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 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.

Affected products

41
  • Juniper Networks/OS Evolved41 versions
    cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*+ 40 more
    • cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*range: <21.4
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:23.2:r1:*:*:*:*:*:*
    • (no CPE)range: <21.4R3-S5-EVO, <22.1R3-S4-EVO, 22.2R1-EVO and later, <22.3R2-S2-EVO, <22.3R3-S1-EVO, <22.4R2-S1-EVO, <22.4R3-EVO, <23.2R1-S1-EVO, <23.2R2-EVO
    • (no CPE)range: 0

Patches

Vulnerability mechanics

References

1

News mentions

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