A Use After Free vulnerability in command processing of Juniper Networks Junos OS on MX Series allows a local, authenticated attacker to cause the broadband edge service manager daemon (bbe-smgd) to crash upon execution of specific CLI commands, creating a Denial of Service (DoS) condition. The process crashes and restarts automatically. When specific CLI commands are executed, the bbe-smgd daemon attempts to write into an area of memory (mgd socket) that was already closed, causing the process to crash. This process manages and controls the configuration of broadband subscriber sessions and services. While the process is unavailable, additional subscribers will not be able to connect to the device, causing a temporary Denial of Service condition. This issue only occurs if Graceful Ro
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-S5, 22.1R3, 22.2R3, 22.3R2, 22.4R1, and all subsequent releases.
Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.
| 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-S5 | 21.4R3-S5 | 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 ↗ |