{"id":"CVE-2024-21594","aliases":["EUVD-2024-19242","GHSA-c34w-cgqm-j3j9"],"status":"published","title":"Junos OS: SRX 5000 Series: Repeated execution of a specific CLI command causes a flowd crash","description":"A Heap-based Buffer Overflow vulnerability in the Network Services Daemon (NSD) of Juniper Networks Junos OS allows authenticated, low privileged, local attacker to cause a Denial of Service (DoS).\n\nOn an SRX 5000 Series device, when executing a specific command repeatedly, memory is corrupted, which leads to a Flow Processing Daemon (flowd) crash.\n\nThe NSD process has to be restarted to restore services.\n\nIf this issue occurs, it can be checked with the following command:\n\nuser@host\u003e request security policies check\nThe following log message can also be observed:\n\nError: policies are out of sync for PFE node\u003cnumber\u003e.fpc\u003cnumber\u003e.pic\u003cnumber\u003e.\nThis issue affects:\n\nJuniper Networks Junos OS on SRX 5000 Series\n\n\n\n  *  All versions earlier than 20.4R3-S6;\n  *  21.1 versions earlier than 21.1R3-S5;\n  *  21.2 versions earlier than 21.2R3-S4;\n  *  21.3 versions earlier than 21.3R3-S3;\n  *  21.4 versions earlier than 21.4R3-S3;\n  *  22.1 versions earlier than 22.1R3-S1;\n  *  22.2 versions earlier than 22.2R3;\n  *  22.3 versions earlier than 22.3R2.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00173,"percentile":0.06793,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2024-01-12T00:52:18Z","modified":"2026-06-17T07:09:47Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA75733","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","tags":["technical-description","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21594"},{"url":"https://github.com/advisories/GHSA-c34w-cgqm-j3j9"}],"sources":{"cve":[{"id":"CVE-2024-21594","title":"Junos OS: SRX 5000 Series: Repeated execution of a specific CLI command causes a flowd crash","description":"\nA Heap-based Buffer Overflow vulnerability in the Network Services Daemon (NSD) of Juniper Networks Junos OS allows authenticated, low privileged, local attacker to cause a Denial of Service (DoS).\n\nOn an SRX 5000 Series device, when executing a specific command repeatedly, memory is corrupted, which leads to a Flow Processing Daemon (flowd) crash.\n\nThe NSD process has to be restarted to restore services.\n\nIf this issue occurs, it can be checked with the following command:\n\nuser@host\u003e request security policies check\nThe following log message can also be observed:\n\nError: policies are out of sync for PFE node\u003cnumber\u003e.fpc\u003cnumber\u003e.pic\u003cnumber\u003e.\nThis issue affects:\n\nJuniper Networks Junos OS on SRX 5000 Series\n\n\n\n  *  All versions earlier than 20.4R3-S6;\n  *  21.1 versions earlier than 21.1R3-S5;\n  *  21.2 versions earlier than 21.2R3-S4;\n  *  21.3 versions earlier than 21.3R3-S3;\n  *  21.4 versions earlier than 21.4R3-S3;\n  *  22.1 versions earlier than 22.1R3-S1;\n  *  22.2 versions earlier than 22.2R3;\n  *  22.3 versions earlier than 22.3R2.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T00:52:18.218Z","modified":"2025-06-03T14:05:53.514Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:34:05.077718Z"}],"euvd":[{"id":"EUVD-2024-19242","description":"\nA Heap-based Buffer Overflow vulnerability in the Network Services Daemon (NSD) of Juniper Networks Junos OS allows authenticated, low privileged, local attacker to cause a Denial of Service (DoS).\n\nOn an SRX 5000 Series device, when executing a specific command repeatedly, memory is corrupted, which leads to a Flow Processing Daemon (flowd) crash.\n\nThe NSD process has to be restarted to restore services.\n\nIf this issue occurs, it can be checked with the following command:\n\nuser@host\u003e request security policies check\nThe following log message can also be observed:\n\nError: policies are out of sync for PFE node\u003cnumber\u003e.fpc\u003cnumber\u003e.pic\u003cnumber\u003e.\nThis issue affects:\n\nJuniper Networks Junos OS on SRX 5000 Series\n\n\n\n  *  All versions earlier than 20.4R3-S6;\n  *  21.1 versions earlier than 21.1R3-S5;\n  *  21.2 versions earlier than 21.2R3-S4;\n  *  21.3 versions earlier than 21.3R3-S3;\n  *  21.4 versions earlier than 21.4R3-S3;\n  *  22.1 versions earlier than 22.1R3-S1;\n  *  22.2 versions earlier than 22.2R3;\n  *  22.3 versions earlier than 22.3R2.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T00:52:18Z","modified":"2025-06-03T14:05:53Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T20:32:31.558173Z"}],"ghsa":[{"id":"GHSA-c34w-cgqm-j3j9","title":"\nA Heap-based Buffer Overflow vulnerability in the Network Services Daemon (NSD) of Juniper...","description":"\nA Heap-based Buffer Overflow vulnerability in the Network Services Daemon (NSD) of Juniper Networks Junos OS allows authenticated, low privileged, local attacker to cause a Denial of Service (DoS).\n\nOn an SRX 5000 Series device, when executing a specific command repeatedly, memory is corrupted, which leads to a Flow Processing Daemon (flowd) crash.\n\nThe NSD process has to be restarted to restore services.\n\nIf this issue occurs, it can be checked with the following command:\n\nuser@host\u003e request security policies check\nThe following log message can also be observed:\n\nError: policies are out of sync for PFE node\u003cnumber\u003e.fpc\u003cnumber\u003e.pic\u003cnumber\u003e.\nThis issue affects:\n\nJuniper Networks Junos OS on SRX 5000 Series\n\n\n\n  *  All versions earlier than 20.4R3-S6;\n  *  21.1 versions earlier than 21.1R3-S5;\n  *  21.2 versions earlier than 21.2R3-S4;\n  *  21.3 versions earlier than 21.3R3-S3;\n  *  21.4 versions earlier than 21.4R3-S3;\n  *  22.1 versions earlier than 22.1R3-S1;\n  *  22.2 versions earlier than 22.2R3;\n  *  22.3 versions earlier than 22.3R2.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T03:30:48Z","modified":"2024-01-27T05:05:43Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:55:30.137349Z"}],"nvd":[{"id":"CVE-2024-21594","description":"\nA Heap-based Buffer Overflow vulnerability in the Network Services Daemon (NSD) of Juniper Networks Junos OS allows authenticated, low privileged, local attacker to cause a Denial of Service (DoS).\n\nOn an SRX 5000 Series device, when executing a specific command repeatedly, memory is corrupted, which leads to a Flow Processing Daemon (flowd) crash.\n\nThe NSD process has to be restarted to restore services.\n\nIf this issue occurs, it can be checked with the following command:\n\nuser@host\u003e request security policies check\nThe following log message can also be observed:\n\nError: policies are out of sync for PFE node\u003cnumber\u003e.fpc\u003cnumber\u003e.pic\u003cnumber\u003e.\nThis issue affects:\n\nJuniper Networks Junos OS on SRX 5000 Series\n\n\n\n  *  All versions earlier than 20.4R3-S6;\n  *  21.1 versions earlier than 21.1R3-S5;\n  *  21.2 versions earlier than 21.2R3-S4;\n  *  21.3 versions earlier than 21.3R3-S3;\n  *  21.4 versions earlier than 21.4R3-S3;\n  *  22.1 versions earlier than 22.1R3-S1;\n  *  22.2 versions earlier than 22.2R3;\n  *  22.3 versions earlier than 22.3R2.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T01:15:46.88Z","modified":"2026-06-17T07:09:47.13Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:09:30.070039Z"}]}}