Description
An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to gain root privileges, thus compromising the system.
When a configuration that allows unsigned Python op scripts is present on the device, a non-root user is able to execute malicious op scripts as a root-equivalent user, leading to privilege escalation.
This issue affects Junos OS:
* All versions before 22.4R3-S7,
* from 23.2 before 23.2R2-S4,
* from 23.4 before 23.4R2-S6,
* from 24.2 before 24.2R1-S2, 24.2R2,
* from 24.4 before 24.4R1-S2, 24.4R2;
Junos OS Evolved:
* All versions before 22.4R3-S7-EVO,
* from 23.2 before 23.2R2-S4-EVO,
* from 23.4 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-EVO,
* from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Juniper Networks | Junos OS | < 22.4R3-S7, 23.2 – < 23.2R2-S4, 23.4 – < 23.4R2-S6, 24.2 – < 24.2R1-S2, 24.2R2, 24.4 – < 24.4R1-S2, 24.4R2 | 22.4R3-S7 |
| Juniper Networks | Junos OS Evolved | < 22.4R3-S7-EVO, 23.2 – < 23.2R2-S4-EVO, 23.4 – < 23.4R2-S6-EVO, 24.2 – < 24.2R2-EVO, 24.4 – < 24.4R1-S1-EVO, 24.4R2-EVO | 22.4R3-S7-EVO |
Advisories 1
- WID-SEC-2026-1022 Juniper Patchday April 2026: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 9, 2026
References
- https://supportportal.juniper.net/JSA103142 vendor-advisory