{"id":"CVE-2023-44181","aliases":["EUVD-2023-48540","GHSA-9jrm-qw53-pvvc"],"status":"published","title":"Junos OS: QFX5k: l2 loop in the overlay impacts the stability in a EVPN/VXLAN environment","description":"An Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper Networks Junos OS QFX5k devices allows packets to be punted to ARP queue causing a l2 loop resulting in a DDOS violations and DDOS syslog.\n\nThis issue is triggered when Storm control is enabled and ICMPv6 packets are present on device.\n\nThis issue affects Juniper Networks:\n\nJunos OS\n\n\n\n  *  All versions prior to 20.2R3-S6 on QFX5k;\n  *  20.3 versions prior to 20.3R3-S5 on QFX5k;\n  *  20.4 versions prior to 20.4R3-S5 on QFX5k;\n  *  21.1 versions prior to 21.1R3-S4 on QFX5k;\n  *  21.2 versions prior to 21.2R3-S3 on QFX5k;\n  *  21.3 versions prior to 21.3R3-S2 on QFX5k;\n  *  21.4 versions prior to 21.4R3 on QFX5k;\n  *  22.1 versions prior to 22.1R3 on QFX5k;\n  *  22.2 versions prior to 22.2R2 on QFX5k.","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":0.00635,"percentile":0.50755,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-835"],"published":"2023-10-12T23:01:38Z","modified":"2026-06-17T06:27:03Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA73145","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.juniper.net/documentation/us/en/software/junos/security-services/topics/task/rate-limiting-storm-control-disabling-cli-els.html","tags":["product","x_transferred","Technical Description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44181"},{"url":"https://github.com/advisories/GHSA-9jrm-qw53-pvvc"}],"sources":{"cve":[{"id":"CVE-2023-44181","title":"Junos OS: QFX5k: l2 loop in the overlay impacts the stability in a EVPN/VXLAN environment","description":"\nAn Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper Networks Junos OS QFX5k devices allows packets to be punted to ARP queue causing a l2 loop resulting in a DDOS violations and DDOS syslog.\n\nThis issue is triggered when Storm control is enabled and ICMPv6 packets are present on device.\n\nThis issue affects Juniper Networks:\n\nJunos OS\n\n\n\n  *  All versions prior to 20.2R3-S6 on QFX5k;\n  *  20.3 versions prior to 20.3R3-S5 on QFX5k;\n  *  20.4 versions prior to 20.4R3-S5 on QFX5k;\n  *  21.1 versions prior to 21.1R3-S4 on QFX5k;\n  *  21.2 versions prior to 21.2R3-S3 on QFX5k;\n  *  21.3 versions prior to 21.3R3-S2 on QFX5k;\n  *  21.4 versions prior to 21.4R3 on QFX5k;\n  *  22.1 versions prior to 22.1R3 on QFX5k;\n  *  22.2 versions prior to 22.2R2 on QFX5k.\n\n\n\n\n\n\n","status":"published","published":"2023-10-12T23:01:38.15Z","modified":"2024-09-18T14:43:54.724Z","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"}],"updated_at":"2026-11-02T14:35:21.232549Z"}],"euvd":[{"id":"EUVD-2023-48540","description":"\nAn Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper Networks Junos OS QFX5k devices allows packets to be punted to ARP queue causing a l2 loop resulting in a DDOS violations and DDOS syslog.\n\nThis issue is triggered when Storm control is enabled and ICMPv6 packets are present on device.\n\nThis issue affects Juniper Networks:\n\nJunos OS\n\n\n\n  *  All versions prior to 20.2R3-S6 on QFX5k;\n  *  20.3 versions prior to 20.3R3-S5 on QFX5k;\n  *  20.4 versions prior to 20.4R3-S5 on QFX5k;\n  *  21.1 versions prior to 21.1R3-S4 on QFX5k;\n  *  21.2 versions prior to 21.2R3-S3 on QFX5k;\n  *  21.3 versions prior to 21.3R3-S2 on QFX5k;\n  *  21.4 versions prior to 21.4R3 on QFX5k;\n  *  22.1 versions prior to 22.1R3 on QFX5k;\n  *  22.2 versions prior to 22.2R2 on QFX5k.\n\n\n\n\n\n\n","status":"published","published":"2023-10-12T23:01:38Z","modified":"2024-09-18T14:43:54Z","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":"2026-11-03T00:28:21.470786Z"}],"ghsa":[{"id":"GHSA-9jrm-qw53-pvvc","title":"\nAn Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper...","description":"\nAn Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper Networks Junos OS QFX5k devices allows packets to be punted to ARP queue causing a l2 loop resulting in a DDOS violations and DDOS syslog.\n\nThis issue is triggered when Storm control is enabled and ICMPv6 packets are present on device.\n\nThis issue affects Juniper Networks:\n\nJunos OS\n\n\n\n  *  All versions prior to 20.2R3-S6 on QFX5k;\n  *  20.3 versions prior to 20.3R3-S5 on QFX5k;\n  *  20.4 versions prior to 20.4R3-S5 on QFX5k;\n  *  21.1 versions prior to 21.1R3-S4 on QFX5k;\n  *  21.2 versions prior to 21.2R3-S3 on QFX5k;\n  *  21.3 versions prior to 21.3R3-S2 on QFX5k;\n  *  21.4 versions prior to 21.4R3 on QFX5k;\n  *  22.1 versions prior to 22.1R3 on QFX5k;\n  *  22.2 versions prior to 22.2R2 on QFX5k.\n\n\n\n\n\n\n","status":"published","published":"2023-10-13T00:30:19Z","modified":"2024-04-04T08:36:43Z","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-835"],"updated_at":"2026-11-02T14:56:59.652212Z"}],"nvd":[{"id":"CVE-2023-44181","description":"\nAn Improperly Implemented Security Check for Standard vulnerability in storm control of Juniper Networks Junos OS QFX5k devices allows packets to be punted to ARP queue causing a l2 loop resulting in a DDOS violations and DDOS syslog.\n\nThis issue is triggered when Storm control is enabled and ICMPv6 packets are present on device.\n\nThis issue affects Juniper Networks:\n\nJunos OS\n\n\n\n  *  All versions prior to 20.2R3-S6 on QFX5k;\n  *  20.3 versions prior to 20.3R3-S5 on QFX5k;\n  *  20.4 versions prior to 20.4R3-S5 on QFX5k;\n  *  21.1 versions prior to 21.1R3-S4 on QFX5k;\n  *  21.2 versions prior to 21.2R3-S3 on QFX5k;\n  *  21.3 versions prior to 21.3R3-S2 on QFX5k;\n  *  21.4 versions prior to 21.4R3 on QFX5k;\n  *  22.1 versions prior to 22.1R3 on QFX5k;\n  *  22.2 versions prior to 22.2R2 on QFX5k.\n\n\n\n\n\n\n","status":"published","published":"2023-10-13T00:15:11.837Z","modified":"2026-06-17T06:27:03.653Z","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-835"],"updated_at":"2026-11-02T14:08:37.83429Z"}]}}