CVE-2025-30661

Summary

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

VendorProductVersion RangeStatus
Juniper NetworksJunos OS23.2 < 23.2R2-S4affected
Juniper NetworksJunos OS23.4 < 23.4R2-S5affected
Juniper NetworksJunos OS24.2 < 24.2R2-S1affected
Juniper NetworksJunos OS24.4 < 24.4R1-S3, 24.4R2affected
Juniper NetworksJunos OS0 < 23.1R2unaffected

Weaknesses

  • CWE-732: CWE-732 Incorrect Permission Assignment for Critical Resource

Workarounds

Use access lists or firewall filters to limit access to the device via CLI only from trusted hosts and administrators.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References