{"id":"CVE-2024-30388","aliases":["EUVD-2024-28309","GHSA-fwcw-wmg8-r4vq"],"status":"published","title":"Junos OS: QFX5000 Series and EX Series: Specific malformed LACP packets will cause flaps","description":"An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIf a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss.\nThis issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series:\n\n\n\n  *  20.4 versions from \n\n20.4R3-S4\n\nbefore 20.4R3-S8,\n  *  21.2 versions from \n\n21.2R3-S2\n\nbefore 21.2R3-S6,\n  *  21.4 versions from \n\n21.4R2\n\nbefore 21.4R3-S4,\n\n  *  22.1 versions from\n\n22.1R2\n\n before 22.1R3-S3,\n  *  22.2 versions before 22.2R3-S1,\n  *  22.3 versions before 22.3R2-S2, 22.3R3,\n  *  22.4 versions before 22.4R2-S1, 22.4R3.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00289,"percentile":0.21613,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-653"],"published":"2024-04-12T15:09:12Z","modified":"2026-06-17T07:26:52Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"http://supportportal.juniper.net/JSA79089","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/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","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-30388"},{"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"url":"https://github.com/advisories/GHSA-fwcw-wmg8-r4vq"}],"sources":{"cve":[{"id":"CVE-2024-30388","title":"Junos OS: QFX5000 Series and EX Series: Specific malformed LACP packets will cause flaps","description":"An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIf a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss.\nThis issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series:\n\n\n\n  *  20.4 versions from \n\n20.4R3-S4\n\nbefore 20.4R3-S8,\n  *  21.2 versions from \n\n21.2R3-S2\n\nbefore 21.2R3-S6,\n  *  21.4 versions from \n\n21.4R2\n\nbefore 21.4R3-S4,\n\n  *  22.1 versions from\n\n22.1R2\n\n before 22.1R3-S3,\n  *  22.2 versions before 22.2R3-S1,\n  *  22.3 versions before 22.3R2-S2, 22.3R3,\n  *  22.4 versions before 22.4R2-S1, 22.4R3.","status":"published","published":"2024-04-12T15:09:12.944Z","modified":"2024-08-02T01:32:07.381Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T14:34:07.831255Z"}],"euvd":[{"id":"EUVD-2024-28309","description":"An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIf a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss.\nThis issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series:\n\n\n\n  *  20.4 versions from \n\n20.4R3-S4\n\nbefore 20.4R3-S8,\n  *  21.2 versions from \n\n21.2R3-S2\n\nbefore 21.2R3-S6,\n  *  21.4 versions from \n\n21.4R2\n\nbefore 21.4R3-S4,\n\n  *  22.1 versions from\n\n22.1R2\n\n before 22.1R3-S3,\n  *  22.2 versions before 22.2R3-S1,\n  *  22.3 versions before 22.3R2-S2, 22.3R3,\n  *  22.4 versions before 22.4R2-S1, 22.4R3.","status":"published","published":"2024-04-12T15:09:12Z","modified":"2024-08-02T01:32:07Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","level":"high"}],"updated_at":"2026-11-03T03:50:24.625974Z"}],"ghsa":[{"id":"GHSA-fwcw-wmg8-r4vq","title":"An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe)...","description":"An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIf a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss.\nThis issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series:\n\n\n\n  *  20.4 versions from \n\n20.4R3-S4\n\nbefore 20.4R3-S8,\n  *  21.2 versions from \n\n21.2R3-S2\n\nbefore 21.2R3-S6,\n  *  21.4 versions from \n\n21.4R2\n\nbefore 21.4R3-S4,\n\n  *  22.1 versions from\n\n22.1R2\n\n before 22.1R3-S3,\n  *  22.2 versions before 22.2R3-S1,\n  *  22.3 versions before 22.3R2-S2, 22.3R3,\n  *  22.4 versions before 22.4R2-S1, 22.4R3.","status":"published","published":"2024-04-12T18:33:26Z","modified":"2026-01-23T18:31:22Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T15:05:53.055975Z"}],"nvd":[{"id":"CVE-2024-30388","description":"An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIf a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss.\nThis issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series:\n\n\n\n  *  20.4 versions from \n\n20.4R3-S4\n\nbefore 20.4R3-S8,\n  *  21.2 versions from \n\n21.2R3-S2\n\nbefore 21.2R3-S6,\n  *  21.4 versions from \n\n21.4R2\n\nbefore 21.4R3-S4,\n\n  *  22.1 versions from\n\n22.1R2\n\n before 22.1R3-S3,\n  *  22.2 versions before 22.2R3-S1,\n  *  22.3 versions before 22.3R2-S2, 22.3R3,\n  *  22.4 versions before 22.4R2-S1, 22.4R3.","status":"published","published":"2024-04-12T16:15:38.093Z","modified":"2026-06-17T07:26:52.107Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-653"],"updated_at":"2026-11-02T14:09:50.299382Z"}]}}