Due to an improper Initialization vulnerability on Juniper Networks Junos OS QFX5100-96S devices with QFX 5e Series image installed, ddos-protection configuration changes will not take effect beyond the default DDoS (Distributed Denial of Service) settings when configured from the CLI. The DDoS protection (jddosd) daemon allows the device to continue to function while protecting the packet forwarding engine (PFE) during the DDoS attack. When this issue occurs, the default DDoS settings within the PFE apply, as CPU bound packets will be throttled and dropped in the PFE when the limits are exceeded. To check if the device has this issue, the administrator can execute the following command to monitor the status of DDoS protection: user@device> show ddos-protection protocols error: the ddos-pr
The following software releases have been updated to resolve this specific issue: 17.3R3-S10, 17.4R3-S4, 18.1R3-S10, 18.2R3-S3, 18.3R3-S2, 18.4R2-S4, 18.4R3-S1, 19.1R3, 19.1R3-S4, 19.2R2, 19.3R3, 19.4R2, 20.1R1, and all subsequent releases.
The following command can be used to enable ddos-protection manually: root@device% /usr/sbin/jddosd -N &
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=17.3<17.3R3-S10 | 17.3R3-S10 | advisory ↗ |
| Juniper Networks Junos OS | >=17.4<17.4R3-S4 | 17.4R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=18.1<18.1R3-S10 | 18.1R3-S10 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R3-S3 | 18.2R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R3-S2 | 18.3R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=18.4<18.4R2-S4, 18.4R3-S1 | 18.4R2-S4, 18.4R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=19.1<19.1R3, 19.1R3-S4 | 19.1R3, 19.1R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=19.2<19.2R2 | 19.2R2 | advisory ↗ |
| Juniper Networks Junos OS | >=19.3<19.3R3 | 19.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=19.4<19.4R2 | 19.4R2 | advisory ↗ |