CVE-2024-39530: Junos OS: Attempting to access specific sensors on platforms not supporting these will lead to a chassisd crash

Published Jul 11, 2024

Updated

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.

Affected Software

20 affected components

Juniper Junos=21.4-r3

Juniper Junos=21.4-r3-s1

Juniper Junos=21.4-r3-s2

Juniper Junos=21.4-r3-s3

Juniper Junos=21.4-r3-s4

Juniper Junos=21.1-r3

Juniper Junos=21.1-r3-s1

Juniper Junos=21.1-r3-s2

Juniper Junos=21.1-r3-s3

Juniper Junos=22.2-r2

Juniper Junos=22.2-r2-s1

Juniper Junos=22.2-r2-s2

Juniper Junos=22.3-r1

Juniper Junos=22.3-r1-s1

Juniper Junos=22.3-r1-s2

Juniper Junos=22.3-r2

Juniper Junos=22.3-r2-s1

Juniper Junos=22.4-r1

Juniper Junos=22.4-r1-s1

Juniper Junos=22.4-r1-s2

Remediation

Information

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.

Event History

Jul 11, 2024

CVE Published

via MITRE·04:04 PM

Data Sourced

via MITRE·04:04 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·04:15 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2024-39530?

CVE-2024-39530 has been classified as a Denial-of-Service vulnerability.

How do I fix CVE-2024-39530?

To remediate CVE-2024-39530, update your Junos OS to the latest patched version provided by Juniper Networks.

What versions of Junos OS are affected by CVE-2024-39530?

CVE-2024-39530 affects multiple versions of Junos OS, including 21.1, 21.4, 22.2, 22.3, and 22.4.

Can CVE-2024-39530 be exploited remotely?

Yes, CVE-2024-39530 can be exploited by an unauthenticated, network-based attacker.

What are the potential impacts of exploiting CVE-2024-39530?

Exploiting CVE-2024-39530 can lead to a Denial-of-Service condition, interrupting network availability.