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.
Problem types
CWE-250: Execution with Unnecessary Privileges
Product status
Any version before 22.4R3-S7
23.2 (semver) before 23.2R2-S4
23.4 (semver) before 23.4R2-S6
24.2 (semver) before 24.2R1-S2, 24.2R2
24.4 (semver) before 24.4R1-S2, 24.4R2
Any version before 22.4R3-S7-EVO
23.2 (semver) before 23.2R2-S4-EVO
23.4 (semver) before 23.4R2-S6-EVO
24.2 (semver) before 24.2R2-EVO
24.4 (semver) before 24.4R1-S1-EVO, 24.4R2-EVO
Timeline
| 2026-04-08: | Initial Publication |
| 2026-04-16: | While 'language python3' allows an attacker to execute local Python scripts, the scenario with the highest risk of malicious exploitation occurs when an attacker can execute remote Python scripts |
References
supportportal.juniper.net/JSA103142