CVE-2025-30661: Junos OS: Low-privileged user can cause script to run as root, leading to privilege escalation
An Incorrect Permission Assignment for Critical Resource vulnerability in line card script processing of Juniper Networks Junos OS allows a local, low-privileged user to install scripts to be executed as root, leading to privilege escalation.
A local user with access to the local file system can copy a script to the router in a way that will be executed as root, as the system boots. Execution of the script as root can lead to privilege escalation, potentially providing the adversary complete control of the system.
This issue only affects specific line cards, such as the MPC10, MPC11, LC4800, LC9600, MX304-LMIC16, SRX4700, and EX9200-15C.
This issue affects Junos OS: from 23.2 before 23.2R2-S4, from 23.4 before 23.4R2-S5, from 24.2 before 24.2R2-S1, from 24.4 before 24.4R1-S3, 24.4R2.
This issue does not affect versions prior to 23.1R2.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2025-30661?
CVE-2025-30661 has a high severity due to its potential for local privilege escalation.
How do I fix CVE-2025-30661?
To fix CVE-2025-30661, update your Junos OS to a version that addresses this vulnerability.
Who is affected by CVE-2025-30661?
Local, low-privileged users of Juniper Networks Junos OS versions 23.1R2 to 24.4R1-S3 are affected by CVE-2025-30661.
What is the impact of CVE-2025-30661?
The impact of CVE-2025-30661 includes unauthorized script execution with root privileges, leading to potential system compromise.
Is CVE-2025-30661 publicly known?
Yes, CVE-2025-30661 is publicly known and documented under the CVE database.