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High severity7.5NVD Advisory· Published Jan 12, 2024· Updated Jun 17, 2026

CVE-2024-21604

CVE-2024-21604

Description

An Allocation of Resources Without Limits or Throttling vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

If a high rate of specific valid packets are processed by the routing engine (RE) this will lead to a loss of connectivity of the RE with other components of the chassis and thereby a complete and persistent system outage. Please note that a carefully designed lo0 firewall filter will block or limit these packets which should prevent this issue from occurring.

The following log messages can be seen when this issue occurs:

kernel: nf_conntrack: nf_conntrack: table full, dropping packet This issue affects Juniper Networks Junos OS Evolved:

  • All versions earlier than 20.4R3-S7-EVO;
  • 21.2R1-EVO and later versions;
  • 21.4-EVO versions earlier than 21.4R3-S5-EVO;
  • 22.1-EVO versions earlier than 22.1R3-S2-EVO;
  • 22.2-EVO versions earlier than 22.2R3-EVO;
  • 22.3-EVO versions earlier than 22.3R2-EVO;
  • 22.4-EVO versions earlier than 22.4R2-EVO.

AI Insight

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

Affected products

48
  • Juniper Networks/OS Evolved48 versions
    cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s1:*:*:*:*:*:*+ 47 more
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:*
    • (no CPE)range: <20.4R3-S7-EVO, 21.2R1-EVO and later, <21.4R3-S5-EVO, <22.1R3-S2-EVO, <22.2R3-EVO, <22.3R2-EVO, <22.4R2-EVO
    • (no CPE)range: 0

Patches

Vulnerability mechanics

References

2

News mentions

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