Description
An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of Juniper Networks Junos OS on SRX1500, SRX4100, SRX4200 and SRX4600 allows a local attacker with low privileges to cause a complete Denial of Service (DoS).
When a specific 'show chassis' CLI command is executed, chassisd crashes and restarts which causes a momentary impact to all traffic until all modules are online again.
This issue affects Junos OS on SRX1500, SRX4100, SRX4200 and SRX4600:
* 23.2 versions before 23.2R2-S6,
* 23.4 versions before 23.4R2-S7
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R2,
* 25.2 versions before 25.2R1-S1, 25.2R2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Juniper Networks | Junos OS | < 23.2R2-S6, 23.4 – < 23.4R2-S7, 24.2 – < 24.2R2-S2, 24.4 – < 24.4R2, 25.2 – < 25.2R1-S1, 25.2R2 | 23.2R2-S6 |
Advisories 1
- WID-SEC-2026-1022 Juniper Patchday April 2026: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 9, 2026
References
- https://kb.juniper.net/JSA107873 vendor-advisory