An Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause memory leak leading to Denial of Service (DoS). On all Junos OS platforms, when NSR is enabled, a BGP flap will cause memory leak. A manual reboot of the system will restore the services. Note: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability. The memory usage can be monitored using the below commands. user@host> show chassis routing-engine no-forwarding user@host> show system memory | no-more This issue affects: Juniper Networks Junos OS * 21.2 versions earlier than 21.2R3-S5; * 21.3 versions earlier than 21.3R3-S4; * 21.4 versions earlier than 21.4R3-S4; * 22.1 version
The following software releases have been updated to resolve this specific issue: Junos OS 21.2R3-S5, 21.3R3-S4, 21.4R3-S4, 22.1R3-S2, 22.2R3-S2, 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 | >=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-S4 | 21.4R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=22.1<22.1R3-S2 | 22.1R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=22.2<22.2R3-S2 | 22.2R3-S2 | 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 ↗ |