CVE-2024-39530: Junos OS: Attempting to access specific sensors on platforms not supporting these will lead to a chassisd crash
First published: Thu 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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 |
Remedy
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.
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Reference Links
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.
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- vendor/juniper
- canonical/juniper junos
- version/juniper junos/21.4-r3
- version/juniper junos/21.4-r3-s1
- version/juniper junos/21.4-r3-s2
- version/juniper junos/21.4-r3-s3
- version/juniper junos/21.4-r3-s4
- version/juniper junos/21.1-r3
- version/juniper junos/21.1-r3-s1
- version/juniper junos/21.1-r3-s2
- version/juniper junos/21.1-r3-s3
- version/juniper junos/22.2-r2
- version/juniper junos/22.2-r2-s1
- version/juniper junos/22.2-r2-s2
- version/juniper junos/22.3-r1
- version/juniper junos/22.3-r1-s1
- version/juniper junos/22.3-r1-s2
- version/juniper junos/22.3-r2
- version/juniper junos/22.3-r2-s1
- version/juniper junos/22.4-r1
- version/juniper junos/22.4-r1-s1
- version/juniper junos/22.4-r1-s2