Description
An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a memory corruption that leads to a rpd crash.
When
the logical interface using a routing instance flaps continuously, specific updates are sent to the jflow/sflow modules. This results in memory corruption, leading to an rpd crash and restart.
Continued receipt of these specific updates will cause a sustained Denial of Service condition.
This issue affects Junos OS:
* All versions before 21.2R3-S9,
* All versions of 21.4,
* All versions of 22.2,
* from 22.4 before 22.4R3-S7,
* from 23.2 before 23.2R2-S3,
* from 23.4 before 23.4R2-S4,
* from 24.2 before 24.2R2.
Junos OS Evolved:
* All versions of 21.2-EVO,
* All versions of 21.4-EVO,
* All versions of 22.2-EVO,
* from 22.4 before 22.4R3-S7-EVO,
* from 23.2 before 23.2R2-S3-EVO,
* from 23.4 before 23.4R2-S4-EVO,
* from 24.2 before 24.2R2-EVO.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Juniper Networks | Junos OS | < 21.2R3-S9, 21.4 – < 21.4*, 22.2 – < 22.2*, 22.4 – < 22.4R3-S7, 23.2 – < 23.2R2-S3, 23.4 – < 23.4R2-S4, 24.2 – < 24.2R2 | 21.2R3-S9 |
| Juniper Networks | Junos OS Evolved | < 21.2*-EVO, 21.4 – < 21.4*-EVO, 22.2 – < 22.2*-EVO, 22.4 – < 22.4R3-S7-EVO, 23.2 – < 23.2R2-S3-EVO, 23.4 – < 23.4R2-S4-EVO, 24.2 – < 24.2R2-EVO | 21.2*-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/JSA100062 vendor-advisory