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Medium severity6.5NVD Advisory· Published Oct 10, 2018· Updated Jun 17, 2026

CVE-2018-0056

CVE-2018-0056

Description

If a duplicate MAC address is learned by two different interfaces on an MX Series device, the MAC address learning function correctly flaps between the interfaces. However, the Layer 2 Address Learning Daemon (L2ALD) daemon might crash when attempting to delete the duplicate MAC address when the particular entry is not found in the internal MAC address table. This issue only occurs on MX Series devices with l2-backhaul VPN configured. No other products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series.

Affected products

29
  • Juniper Networks/Junos29 versions
    cpe:2.3:o:juniper:junos:15.1:*:*:*:*:*:*:*+ 28 more
    • cpe:2.3:o:juniper:junos:15.1:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:f2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:f3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:f4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:f5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:f6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:r4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:r5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:15.1:r6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:16.1:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:16.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:16.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:16.1:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:16.2:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:16.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.1:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.2:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:*:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:*
    • (no CPE)range: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series
    • (no CPE)range: 15.1

Patches

Vulnerability mechanics

References

2

News mentions

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