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:
<host> 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.
Metrics
Affected Vendors & Products
Solution
The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.4R3-S7-EVO, 21.4R3-S5-EVO, 22.1R3-S2-EVO, 22.2R3-EVO, 22.3R2-EVO, 22.4R2-EVO, 23.2R1-EVO, and all subsequent releases.
Workaround
To prevent the device from receiving high rates of valid traffic please configure firewall filters to block unexpected and even throttle expected traffic.
Tue, 03 Jun 2025 14:15:00 +0000
Type | Values Removed | Values Added |
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Metrics |
ssvc
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Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2025-06-03T14:05:41.706Z
Reserved: 2023-12-27T19:38:25.707Z
Link: CVE-2024-21604

Updated: 2024-08-01T22:27:35.509Z

Status : Modified
Published: 2024-01-12T01:15:48.677
Modified: 2024-11-21T08:54:42.177
Link: CVE-2024-21604

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