An Improper Validation of Syntactic Correctness of Input vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS). If an attacker sends high rate of specific ICMP traffic to a device with VXLAN configured, this causes a deadlock of the PFE and results in the device becoming unresponsive. A manual restart will be required to recover the device. This issue only affects EX4100, EX4400, EX4600, QFX5000 Series devices. This issue affects: Juniper Networks Junos OS * 21.4R3 versions earlier than 21.4R3-S4; * 22.1R3 versions earlier than 22.1R3-S3; * 22.2R2 versions earlier than 22.2R3-S1; * 22.3 versions earlier than 22.3R2-S2, 22.3R3; * 22.4 versions earlier than 22
The following software releases have been updated to resolve this specific issue: Junos OS 21.4R3-S4, 22.1R3-S3, 22.2R3-S1, 22.3R2-S2, 22.3R3, 22.4R2, 23.1R2, 23.2R1, and all subsequent releases.
There are no known workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=21.4R3<21.4R3-S4 | 21.4R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=22.1R3<22.1R3-S3 | 22.1R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.2R2<22.2R3-S1 | 22.2R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=22.3<22.3R2-S2, 22.3R3 | 22.3R2-S2, 22.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.4<22.4R2 | 22.4R2 | advisory ↗ |
| Juniper Networks Junos OS | >=23.1<23.1R2 | 23.1R2 | advisory ↗ |