An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series and NFX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If an affected device receives specific valid traffic destined to the device, it will cause the PFE to crash and restart. Continued receipt and processing of this traffic will create a sustained DoS condition. This issue affects Junos OS on SRX Series: * 21.4 versions before 21.4R3-S7.9, * 22.1 versions before 22.1R3-S5.3, * 22.2 versions before 22.2R3-S4.11, * 22.3 versions before 22.3R3, * 22.4 versions before 22.4R3. This issue affects Junos OS on NFX Series: * 21.4 versions before 21.4R3-S8, * 22.1 versions
The following software releases have been updated to resolve this specific issue: SRX Series: 21.4R3-S7.9, 22.1R3-S5.3, 22.2R3-S4.11, 22.3R3, 22.4R3, 23.2R1, and all subsequent releases; NFX Series: 21.4R3-S8, 22.2R3-S5*, 22.3R3, 22.4R3, 23.2R1, and all subsequent releases. * Pending publication. Please note that the software versions 21.4R3-S7.9, 22.1R3-S5.3 and 22.2R3-S4.11 are respins of previously released versions, so special attention needs to be paid to the last digits of the version number.
There are no known workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=21.4<21.4R3-S7.9 | 21.4R3-S7.9 | advisory ↗ |
| Juniper Networks Junos OS | >=21.4<21.4R3-S8 | 21.4R3-S8 | advisory ↗ |
| Juniper Networks Junos OS | >=22.1<22.1R3-S5.3 | 22.1R3-S5.3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.2<22.2R3-S4.11 | 22.2R3-S4.11 | advisory ↗ |
| Juniper Networks Junos OS | >=22.2<22.2R3-S5 | 22.2R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=22.3<22.3R3 | 22.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.4<22.4R3 | 22.4R3 | advisory ↗ |