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:
For this issue to be exploited over GRPC it needs to be configured as follows:[ system services extension-service request-response grpc ]
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was found during internal product security testing or research.
The following software releases have been updated to resolve this specific issue: 21.4R3-S5, 22.1R3-S4, 22.2R3, 22.3R2-S2, 22.3R3, 22.4R2, 23.2R1, and all subsequent releases.
This issue is being tracked as 1708557 which is visible on the Customer Support website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
There are no known workarounds for this issue.
To reduce the risk of exploitation use access lists or firewall filters to limit access to the device only from trusted, administrative networks or hosts.
2024-07-10: Initial Publication 2024-09-13: Minor formatting change to CVSS field