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High severity7.5NVD Advisory· Published Jul 11, 2024· Updated Jun 17, 2026

CVE-2024-39530

CVE-2024-39530

Description

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 products

23
  • Juniper Networks/chassisdllm-create
    Range: 21.4R3 before 21.4R3-S5, 22.1R3 before 22.1R3-S4, 22.2R2 before 22.2R3, 22.3R1 before 22.3R2-S2, 22.3R3, 22.4R1 before 22.4R2
  • Juniper Networks/Junosllm-fuzzy22 versions
    21.4R3 before 21.4R3-S5, 22.1R3 before 22.1R3-S4, 22.2R2 before 22.2R3, 22.3R1 before 22.3R2-S2, 22.3R3, 22.4R1 before 22.4R2+ 21 more
    • (no CPE)range: 21.4R3 before 21.4R3-S5, 22.1R3 before 22.1R3-S4, 22.2R2 before 22.2R3, 22.3R1 before 22.3R2-S2, 22.3R3, 22.4R1 before 22.4R2
    • (no CPE)range: 21.4R3
    • cpe:2.3:o:juniper:junos:21.4:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.1:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.1:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.1:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.1:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.2:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.2:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.2:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.3:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.3:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.3:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.3:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.4:r1-s2:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

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