Description
An Improper Check for Unusual or Exceptional Conditions 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 an affected system receives a specific BGP EVPN update message over an established BGP session, this causes an rpd crash and restart.
A BGP EVPN configuration is not necessary to be vulnerable. If peers are not configured to send BGP EVPN updates to a vulnerable device, then this issue can't occur.
This issue affects iBGP and eBGP, over IPv4 and IPv6.
This issue affects:
Junos OS:
* 23.4 versions from
23.4R2-S3 before 23.4R2-S5,
* 24.2 versions from
24.2R2
before 24.2R2-S1,
* 24.4 versions before 24.4R1-S3, 24.4R2;
Junos OS Evolved:
* 23.4-EVO versions from 23.4R2-S2-EVO before 23.4R2-S5-EVO,
* 24.2-EVO versions from 24.2R2-EVO before 24.2R2-S1-EVO,
* 24.4-EVO versions before 24.4R1-S3-EVO, 24.4R2-EVO.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Juniper Networks | Junos OS | 23.4R2-S3 – < 23.4R2-S5, 24.2R2 – < 24.2R2-S1, 24.4R1 – < 24.4R1-S3, 24.4R2 | 23.4R2-S5 |
| Juniper Networks | Junos OS Evolved | 23.4R2-S2-EVO – < 23.4R2-S5-EVO, 24.2R2-EVO – < 24.2R2-S1-EVO, 24.4R1-EVO – < 24.4R1-S3-EVO, 24.4R2-EVO | 23.4R2-S5-EVO |
Advisories 2
- NCSC-2025-0305 Kwetsbaarheden verholpen in Juniper Networks Junos OS NCSC-NL (Netherlands) · Oct 13, 2025
- WID-SEC-2025-2238 Juniper JUNOS OS, Space, OS Evolved: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 9, 2025
References
- https://supportportal.juniper.net/JSA103165 vendor-advisory