CVE-2018-0056: MX Series: L2ALD daemon may crash if a duplicate MAC is learned by two different interfaces
First published: Wed Oct 10 2018(Updated: )
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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | =15.1 | |
| Juniper JUNOS | =15.1-f2 | |
| Juniper JUNOS | =15.1-f3 | |
| Juniper JUNOS | =15.1-f4 | |
| Juniper JUNOS | =15.1-f5 | |
| Juniper JUNOS | =15.1-f6 | |
| Juniper JUNOS | =15.1-r1 | |
| Juniper JUNOS | =15.1-r2 | |
| Juniper JUNOS | =15.1-r3 | |
| Juniper JUNOS | =15.1-r4 | |
| Juniper JUNOS | =15.1-r5 | |
| Juniper JUNOS | =15.1-r6 | |
| Juniper JUNOS | =16.1 | |
| Juniper JUNOS | =16.1-r1 | |
| Juniper JUNOS | =16.1-r2 | |
| Juniper JUNOS | =16.1-r3 | |
| Juniper JUNOS | =16.2 | |
| Juniper JUNOS | =16.2-r1 | |
| Juniper JUNOS | =17.1 | |
| Juniper JUNOS | =17.1-r1 | |
| Juniper JUNOS | =17.2 | |
| Juniper JUNOS | =17.3 | |
| Juniper JUNOS | =17.3-r1 | |
| Juniper JUNOS | =17.4 | |
| Juniper JUNOS | =17.4-r1 | |
| Juniper JUNOS | =18.1 | |
| Juniper JUNOS | =18.1-r1 |
Remedy
The following software releases have been updated to resolve this specific issue: 15.1R7-S1, 16.1R4-S12, 16.1R6-S6, 16.1R7, 16.2R2-S7, 16.2R3, 17.1R2-S9, 17.1R3, 17.2R1-S7, 17.2R2-S6, 17.2R3, 17.3R2-S4, 17.3R3-S1, 17.4R1-S5, 17.4R2, 18.1R2, 18.2R1, and all subsequent releases. This fix has also been proactively committed into Junos OS: 15.1X49-D150, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590, 15.1X53-D68, 18.2X75-D5, and all subsequent releases.
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