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CVE-2025-21596— Junos OS: SRX1500,SRX4100,SRX4200: Execution of low-privileged CLI command results in chassisd crash

CVSS 5.5 · Medium EPSS 0.08% · P24
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I. Basic Information for CVE-2025-21596

Vulnerability Information
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Vulnerability Title
Junos OS: SRX1500,SRX4100,SRX4200: Execution of low-privileged CLI command results in chassisd crash
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对异常条件的处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Juniper Networks Junos OS存在安全漏洞，该漏洞源于命令行处理异常条件不当，导致底盘守护进程(chassisd)可通过特定命令被本地低权限用户触发崩溃和重启，造成临时拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Juniper NetworksJunos OS 0 ~ 21.4R3-S9 -

II. Public POCs for CVE-2025-21596

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III. Intelligence Information for CVE-2025-21596

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Same Patch Batch · Juniper Networks · 2025-01-09 · 7 CVEs total

CVE-2025-215987.5 HIGHJunos OS and Junos OS Evolved: When BGP traceoptions are configured, receipt of malformed
CVE-2025-215997.5 HIGHJunos OS Evolved: Receipt of specifically malformed IPv6 packets causes kernel memory exha
CVE-2025-216006.5 MEDIUMJunos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically m
CVE-2025-216026.5 MEDIUMJunos OS and Junos OS Evolved: Receipt of specially crafted BGP update packet causes RPD c
CVE-2025-215936.5 MEDIUMJunos OS and Junos OS Evolved: On SRv6 enabled devices, an attacker sending a malformed BG
CVE-2025-215925.5 MEDIUMJunos OS: SRX Series: Low privileged user able to access highly sensitive information on f

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-755

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