Description
A Reachable Assertion vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
When the device receives a specific BGP UPDATE packet, the rpd crashes and restarts. Continuous receipt of this specific packet will cause a sustained DoS condition.
For the issue to occur, BGP multipath with "pause-computation-during-churn" must be configured on the device, and the attacker must send the paths via a BGP UPDATE from a established BGP peer.
This issue affects:
Junos OS:
* All versions before 21.4R3-S7,
* from 22.3 before 22.3R3-S3,
* from 22.4 before 22.4R3-S5,
* from 23.2 before 23.2R2,
* from 23.4 before 23.4R2.
Junos OS Evolved:
* All versions before 21.4R3-S7-EVO,
* from 22.3 before 22.3R3-S3-EVO,
* from 22.4 before 22.4R3-S5-EVO,
* from 23.2 before 23.2R2-EVO,
* from 23.4 before 23.4R2-EVO.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Juniper Networks | Junos OS | < 21.4R3-S7, 22.3 – < 22.3R3-S3, 22.4 – < 22.4R3-S5, 23.2 – < 23.2R2, 23.4 – < 23.4R2, 22.1 – < 22.1*, 22.2 – < 22.2* | 21.4R3-S7 |
| Juniper Networks | Junos OS Evolved | < 21.4R3-S7-EVO, 22.3 – < 22.3R3-S3-EVO, 22.4 – < 22.4R3-S5-EVO, 23.2 – < 23.2R2-EVO, 23.4 – < 23.4R2-EVO | 21.4R3-S7-EVO |
Advisories 1
- WID-SEC-2025-1519 Juniper JUNOS: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Oct 9, 2025
References
- https://supportportal.juniper.net/JSA100080 vendor-advisory