On Juniper Networks EX4300-MP Series, EX4600 Series and QFX5K Series deployed in a Virtual Chassis configuration, receipt of a stream of specific layer 2 frames can cause high CPU load, which could lead to traffic interruption. This issue does not occur when the device is deployed in Stand Alone configuration. The offending layer 2 frame packets can originate only from within the broadcast domain where the device is connected. This issue affects Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior t
The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S9, 17.4R2-S11, 17.4R3-S2, 17.4R3-S3, 18.1R3-S11, 18.2R3-S5, 18.3R2-S4, 18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, 19.2R3, 19.3R2-S4, 19.3R3, 19.4R1-S3, 19.4R2-S1, 19.4R3, 20.1R1-S3, 20.1R2, 20.2R1, and all subsequent releases.
There are no viable workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=17.3<17.3R3-S9 | 17.3R3-S9 | advisory ↗ |
| Juniper Networks Junos OS | >=17.4<17.4R2-S11, 17.4R3-S2, 17.4R3-S3 | 17.4R2-S11, 17.4R3-S2, 17.4R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.1<18.1R3-S11 | 18.1R3-S11 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R3-S5 | 18.2R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R2-S4, 18.3R3-S3 | 18.3R2-S4, 18.3R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.4<18.4R2-S5, 18.4R3-S4 | 18.4R2-S5, 18.4R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=19.1<19.1R3-S2 | 19.1R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=19.2<19.2R1-S5, 19.2R3 | 19.2R1-S5, 19.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=19.3<19.3R2-S4, 19.3R3 | 19.3R2-S4, 19.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=19.4<19.4R1-S3, 19.4R2-S1, 19.4R3 | 19.4R1-S3, 19.4R2-S1, 19.4R3 | advisory ↗ |
| Juniper Networks Junos OS | >=20.1<20.1R1-S3, 20.1R2 | 20.1R1-S3, 20.1R2 | advisory ↗ |