An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis management daemon (chassisd) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a 

Denial-of-Service (DoS).

If an attempt is made to access specific sensors on platforms not supporting these sensors, either via GRPC or netconf, chassisd will crash and restart leading to a restart of all FPCs and thereby a complete outage.

This issue affects Junos OS:



  *  21.4 versions from 21.4R3 before 21.4R3-S5,
  *  22.1 versions from 22.1R3 before 22.1R3-S4,
  *  22.2 versions from 22.2R2 before 22.2R3,
  *  22.3 versions from 22.3R1 before 22.3R2-S2, 22.3R3,
  *  22.4 versions from 22.4R1 before 22.4R2.


This issue does not affect Junos OS versions earlier than 21.4.

Juniper Networks, Inc. CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Juniper Networks, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Juniper Networks, Inc. CWE-754

Juniper Networks, Inc. https://supportportal.juniper.net/JSA82989 [No types assigned]