An Improper Check or Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series, EX2300, EX3400, EX4100, EX4400 and EX4600 allows a adjacent attacker to send specific traffic, which leads to packet flooding, resulting in a Denial of Service (DoS). When a specific IGMP packet is received in an isolated VLAN, it is duplicated to all other ports under the primary VLAN, which causes a flood. This issue affects QFX5000 series, EX2300, EX3400, EX4100, EX4400 and EX4600 platforms only. This issue affects Juniper Junos OS on on QFX5000 Series, EX2300, EX3400, EX4100, EX4400 and EX4600: * All versions prior to 20.4R3-S5; * 21.1 versions prior to 21.1R3-S4; * 21.2 versions prior to 21.2R3-S3; * 21.3 version
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3-S5, 21.4R3-S2, 22.1R3, 22.2R3, 22.3R2, 22.4R1, and all subsequent releases.
There are no known workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | <20.4R3-S5 | 20.4R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=21.1<21.1R3-S4 | 21.1R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=21.2<21.2R3-S3 | 21.2R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=21.3<21.3R3-S5 | 21.3R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=21.4<21.4R3-S2 | 21.4R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=22.1<22.1R3 | 22.1R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.2<22.2R3 | 22.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.3<22.3R2 | 22.3R2 | advisory ↗ |