{"id":"CVE-2024-21604","aliases":["EUVD-2024-19252","GHSA-h4g9-rx7v-v6rf"],"status":"published","title":"Junos OS Evolved: A high rate of specific traffic will cause a complete system outage","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).\n\nIf 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.\n\nThe following log messages can be seen when this issue occurs:\n\n\u003chost\u003e kernel: nf_conntrack: nf_conntrack: table full, dropping packet\nThis issue affects Juniper Networks Junos OS Evolved:\n\n\n\n  *  All versions earlier than 20.4R3-S7-EVO;\n  *  21.2R1-EVO and later versions;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S2-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-EVO;\n  *  22.3-EVO versions earlier than 22.3R2-EVO;\n  *  22.4-EVO versions earlier than 22.4R2-EVO.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00531,"percentile":0.45216,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2024-01-12T00:54:36Z","modified":"2026-06-17T07:09:48Z","products":[{"vendor":"juniper","product":"junos_os_evolved"},{"vendor":"juniper networks","product":"junos os evolved"}],"references":[{"url":"https://supportportal.juniper.net/JSA75745","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","tags":["technical-description","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21604"},{"url":"https://github.com/advisories/GHSA-h4g9-rx7v-v6rf"}],"sources":{"cve":[{"id":"CVE-2024-21604","title":"Junos OS Evolved: A high rate of specific traffic will cause a complete system outage","description":"\nAn 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).\n\nIf 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.\n\nThe following log messages can be seen when this issue occurs:\n\n\u003chost\u003e kernel: nf_conntrack: nf_conntrack: table full, dropping packet\nThis issue affects Juniper Networks Junos OS Evolved:\n\n\n\n  *  All versions earlier than 20.4R3-S7-EVO;\n  *  21.2R1-EVO and later versions;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S2-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-EVO;\n  *  22.3-EVO versions earlier than 22.3R2-EVO;\n  *  22.4-EVO versions earlier than 22.4R2-EVO.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T00:54:36.512Z","modified":"2025-06-03T14:05:41.706Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:34:05.077718Z"}],"euvd":[{"id":"EUVD-2024-19252","description":"\nAn 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).\n\nIf 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.\n\nThe following log messages can be seen when this issue occurs:\n\n\u003chost\u003e kernel: nf_conntrack: nf_conntrack: table full, dropping packet\nThis issue affects Juniper Networks Junos OS Evolved:\n\n\n\n  *  All versions earlier than 20.4R3-S7-EVO;\n  *  21.2R1-EVO and later versions;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S2-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-EVO;\n  *  22.3-EVO versions earlier than 22.3R2-EVO;\n  *  22.4-EVO versions earlier than 22.4R2-EVO.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T00:54:36Z","modified":"2025-06-03T14:05:41Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:31.558173Z"}],"ghsa":[{"id":"GHSA-h4g9-rx7v-v6rf","title":"\nAn Allocation of Resources Without Limits or Throttling vulnerability in the kernel of Juniper...","description":"\nAn 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).\n\nIf 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.\n\nThe following log messages can be seen when this issue occurs:\n\n\u003chost\u003e kernel: nf_conntrack: nf_conntrack: table full, dropping packet\nThis issue affects Juniper Networks Junos OS Evolved:\n\n\n\n  *  All versions earlier than 20.4R3-S7-EVO;\n  *  21.2R1-EVO and later versions;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S2-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-EVO;\n  *  22.3-EVO versions earlier than 22.3R2-EVO;\n  *  22.4-EVO versions earlier than 22.4R2-EVO.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T03:30:48Z","modified":"2024-01-12T03:30:55Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:55:23.490471Z"}],"nvd":[{"id":"CVE-2024-21604","description":"\nAn 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).\n\nIf 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.\n\nThe following log messages can be seen when this issue occurs:\n\n\u003chost\u003e kernel: nf_conntrack: nf_conntrack: table full, dropping packet\nThis issue affects Juniper Networks Junos OS Evolved:\n\n\n\n  *  All versions earlier than 20.4R3-S7-EVO;\n  *  21.2R1-EVO and later versions;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S2-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-EVO;\n  *  22.3-EVO versions earlier than 22.3R2-EVO;\n  *  22.4-EVO versions earlier than 22.4R2-EVO.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T01:15:48.677Z","modified":"2026-06-17T07:09:48.93Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:09:30.070039Z"}]}}