Due to an Improper Initialization vulnerability in Juniper Networks Junos OS on PTX platforms and QFX10K Series with Paradise (PE) chipset-based line cards, ddos-protection configuration changes made from the CLI will not take effect as expected beyond the default DDoS (Distributed Denial of Service) settings in the Packet Forwarding Engine (PFE). This may cause BFD sessions to flap when a high rate of specific packets are received. Flapping of BFD sessions in turn may impact routing protocols and network stability, leading to a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects only the following platforms with Paradise (PE) chipset-based line cards: PTX1000, PTX3000 (NextGen), PT
The following software releases have been updated to resolve this specific issue: Junos OS 17.4R3-S5, 18.2R3-S8, 18.3R3-S5, 18.4R2-S8, 19.1R3-S5, 19.2R3-S2, 19.3R3-S2, 19.4R3-S2, 20.1R3, 20.2R2-S3, 20.2R3, 20.3R2, 20.4R2, 21.1R1, and all subsequent releases.
The default ukern policer rate can be reduced by the CLI command: set system ddos-protection protocols <protocol-group> <aggregate | packet-type> bandwidth <packets-per-second> burst <size>
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=17.4<17.4R3-S5 | 17.4R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R3-S8 | 18.2R3-S8 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R3-S5 | 18.3R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=18.4<18.4R2-S8 | 18.4R2-S8 | advisory ↗ |
| Juniper Networks Junos OS | >=19.1<19.1R3-S5 | 19.1R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=19.2<19.2R3-S2 | 19.2R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=19.3<19.3R3-S2 | 19.3R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=19.4<19.4R3-S2 | 19.4R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=20.1<20.1R3 | 20.1R3 | advisory ↗ |
| Juniper Networks Junos OS | >=20.2<20.2R2-S3, 20.2R3 | 20.2R2-S3, 20.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=20.3<20.3R2, 20.3R3 | 20.3R2, 20.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=20.4<20.4R2 | 20.4R2 | advisory ↗ |