CVE-2025-21596 Information

Description

An Improper Handling of Exceptional Conditions vulnerability in the command-line processing of Juniper Networks Junos OS on SRX1500 SRX4100 and SRX4200 devices allows a local low-privileged authenticated attacker executing the ‘show chassis environment pem’ command to cause the chassis daemon (chassisd) to crash and restart resulting in a temporary Denial of Service (DoS). However repeated execution of this command will eventually cause the chassisd process to fail to restart impacting packet processing on the system.

This issue affects Junos OS on SRX1500 SRX4100 SRX4200: 

All versions before 21.4R3-S9 
from 22.2 before 22.2R3-S5 
from 22.3 before 22.3R3-S4 
from 22.4 before 22.4R3-S4 
from 23.2 before 23.2R2-S3 
from 23.4 before 23.4R2-S1.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://supportportal.juniper.net/JSA92864

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5