Due to an improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved the Routing Protocol Daemon (RPD) service, upon receipt of a specific matching BGP packet meeting a specific term in the flowspec configuration, crashes and restarts causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects only Multiprotocol BGP (MP-BGP) VPNv6 FlowSpec deployments. This issue affects: Juniper Networks Junos OS: 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7; 19.1 versions prior to 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R
The following software releases have been updated to resolve this specific issue: Junos OS: 18.4R1-S8, 18.4R2-S7, 18.4R3-S7, 19.1R2-S2, 19.1R3-S4, 19.2R1-S6, 19.2R3-S2, 19.3R3-S2, 19.4R2-S4, 19.4R3-S1, 20.1R2, 20.1R3, 20.2R2, 20.2R3, 20.3R1-S1, 20.3R2, 20.4R1 and all subsequent releases. Junos OS Evolved: 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.
Do not configure "family inet6-vpn flow" under BGP if no inet6-vpn routes are required to be received.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=18.4<18.4R1-S8, 18.4R2-S7, 18.4R3-S7 | 18.4R1-S8, 18.4R2-S7, 18.4R3-S7 | advisory ↗ |
| Juniper Networks Junos OS | >=19.1<19.1R2-S2, 19.1R3-S4 | 19.1R2-S2, 19.1R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=19.2<19.2R1-S6, 19.2R3-S2 | 19.2R1-S6, 19.2R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=19.3<19.3R3-S2 | 19.3R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=19.4<19.4R2-S4, 19.4R3-S1 | 19.4R2-S4, 19.4R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=20.1<20.1R2, 20.1R3, 20.1R3-EVO | 20.1R2, 20.1R3, 20.1R3-EVO | advisory ↗ |
| Juniper Networks Junos OS | >=20.2<20.2R2, 20.2R3, 20.2R3-EVO | 20.2R2, 20.2R3, 20.2R3-EVO | advisory ↗ |
| Juniper Networks Junos OS | >=20.3<20.3R1-S1, 20.3R2, 20.3R2-EVO | 20.3R1-S1, 20.3R2, 20.3R2-EVO | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=20.3-EVO<20.3R2-EVO | 20.3R2-EVO | advisory ↗ |