An improper check for unusual or exceptional conditions vulnerability in Juniper Networks MX Series platforms with Trio-based MPC (Modular Port Concentrator) deployed in (Ethernet VPN) EVPN-(Virtual Extensible LAN) VXLAN configuration, may allow an attacker sending specific Layer 2 traffic to cause Distributed Denial of Service (DDoS) protection to trigger unexpectedly, resulting in traffic impact. Continued receipt and processing of this specific Layer 2 frames will sustain the Denial of Service (DoS) condition. An indication of compromise is to check DDOS LACP violations: user@device> show ddos-protection protocols statistics brief | match lacp This issue only affects the MX Series platforms with Trio-based MPC. No other products or platforms are affected. This issue affects: Juniper Net
The following software releases have been updated to resolve this specific issue: 15.1R7-S9, 17.3R3-S11, 17.4R3-S4, 18.1R3-S12, 18.2R2-S8, 18.2R3-S8, 18.3R3-S4, 18.4R1-S8, 18.4R2-S7, 18.4R3-S7, 19.1R3-S4, 19.2R1-S6, 19.3R3-S2, 19.4R2-S4, 19.4R3-S2, 20.1R2, 20.1R3, 20.2R2-S1, 20.2R3, 20.3R1-S1, 20.3R2, 20.4R1, and all subsequent releases.
DDoS for LACP can be disabled: set system ddos-protection protocols lacp aggregate disable-routing-engine set system ddos-protection protocols lacp aggregate disable-fpc
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=15.1<15.1R7-S9 | 15.1R7-S9 | advisory ↗ |
| Juniper Networks Junos OS | >=17.3<17.3R3-S11 | 17.3R3-S11 | advisory ↗ |
| Juniper Networks Junos OS | >=17.4<17.4R3-S4 | 17.4R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=18.1<18.1R3-S12 | 18.1R3-S12 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R2-S8, 18.2R3-S8 | 18.2R2-S8, 18.2R3-S8 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R3-S4 | 18.3R3-S4 | 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<19.1R3-S4 | 19.1R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=19.2<19.2R1-S6 | 19.2R1-S6 | 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-S2 | 19.4R2-S4, 19.4R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=20.1<20.1R2, 20.1R3 | 20.1R2, 20.1R3 | advisory ↗ |
| Juniper Networks Junos OS | >=20.2<20.2R2-S1, 20.2R3 | 20.2R2-S1, 20.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=20.3<20.3R1-S1, 20.3R2 | 20.3R1-S1, 20.3R2 | advisory ↗ |