An Improper Input Validation vulnerability in the Packet Forwarding Engine of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause memory leak, leading to Denial of Service (DoS). On all Junos OS QFX5000 Series platforms, when pseudo-VTEP (Virtual Tunnel End Point) is configured under EVPN-VXLAN scenario, and specific DHCP packets are transmitted, DMA memory leak is observed. Continuous receipt of these specific DHCP packets will cause memory leak to reach 99% and then cause the protocols to stop working and traffic is impacted, leading to Denial of Service (DoS) condition. A manual reboot of the system recovers from the memory leak. To confirm the memory leak, monitor for "sheaf:possible leak" and "vtep not found" messages in the logs. This issue affect
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S6, 21.1R3-S5, 21.2R3-S5, 21.3R3-S4, 21.4R3-S3, 22.1R3-S2, 22.2R2-S2, 22.2R3, 22.3R2-S1, 22.3R3, 22.4R1-S2, 22.4R2, 23.2R1, and all subsequent releases.
There are no known workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | <20.4R3-S6 | 20.4R3-S6 | advisory ↗ |
| Juniper Networks Junos OS | >=21.1<21.1R3-S5 | 21.1R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=21.2<21.2R3-S5 | 21.2R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=21.3<21.3R3-S4 | 21.3R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=21.4<21.4R3-S3 | 21.4R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.1<22.1R3-S2 | 22.1R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=22.2<22.2R2-S2, 22.2R3 | 22.2R2-S2, 22.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.3<22.3R2-S1, 22.3R3 | 22.3R2-S1, 22.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.4<22.4R1-S2, 22.4R2 | 22.4R1-S2, 22.4R2 | advisory ↗ |