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Medium severity6.5NVD Advisory· Published Jan 12, 2024· Updated Jun 17, 2026

CVE-2024-21603

CVE-2024-21603

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the kernel of Juniper Network Junos OS on MX Series allows a network based attacker with low privileges to cause a denial of service.

If a scaled configuration for Source class usage (SCU) / destination class usage (DCU) (more than 10 route classes) is present and the SCU/DCU statistics are gathered by executing specific SNMP requests or CLI commands, a 'vmcore' for the RE kernel will be seen which leads to a device restart. Continued exploitation of this issue will lead to a sustained DoS.

This issue only affects MX Series devices with MPC10, MPC11 or LC9600, and MX304. No other MX Series devices are affected.

This issue affects Juniper Networks Junos OS:

  • All versions earlier than 20.4R3-S9;
  • 21.2 versions earlier than 21.2R3-S6;
  • 21.3 versions earlier than 21.3R3-S5;
  • 21.4 versions earlier than 21.4R3;
  • 22.1 versions earlier than 22.1R3;
  • 22.2 versions earlier than 22.2R2;
  • 22.3 versions earlier than 22.3R2.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

64
  • Juniper Networks/Junos64 versions
    cpe:2.3:o:juniper:junos:20.4:-:*:*:*:*:*:*+ 63 more
    • cpe:2.3:o:juniper:junos:20.4:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s7:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3-s8:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.4:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r3-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.2:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.3:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:21.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.1:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.1:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.1:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.1:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.1:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.2:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.2:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.2:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:22.3:-:*:*:*:*:*:*
    • 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:r1:*:*:*:*:*:*
    • (no CPE)range: <20.4R3-S9, <21.2R3-S6, <21.3R3-S5, <21.4R3, <22.1R3, <22.2R2, <22.3R2
    • (no CPE)range: 0

Patches

Vulnerability mechanics

References

2

News mentions

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