{"id":"CVE-2024-21599","aliases":["EUVD-2024-19247","GHSA-pw7f-949h-594r"],"status":"published","title":"Junos OS: MX Series: MPC3E memory leak with PTP configuration","description":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf an MX Series device receives PTP packets on an MPC3E that doesn't support PTP this causes a memory leak which will result in unpredictable behavior and ultimately in an MPC crash and restart.\n\nTo monitor for this issue, please use the following FPC vty level commands:\n\nshow heap\nshows an increase in \"LAN buffer\" utilization and\n\nshow clksync ptp nbr-upd-info\nshows non-zero \"Pending PFEs\" counter.\n\nThis issue affects Juniper Networks Junos OS on MX Series with MPC3E:\n\n\n\n  *  All versions earlier than 20.4R3-S3;\n  *  21.1 versions earlier than 21.1R3-S4;\n  *  21.2 versions earlier than 21.2R3;\n  *  21.3 versions earlier than 21.3R2-S1, 21.3R3;\n  *  21.4 versions earlier than 21.4R2;\n  *  22.1 versions earlier than 22.1R2.","severity":{"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","from":"cve"},"epss":{"day":"2026-11-12","score":0.00291,"percentile":0.21927,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-401"],"published":"2024-01-12T00:53:23Z","modified":"2026-06-17T07:09:48Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA75740","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","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21599"},{"url":"https://github.com/advisories/GHSA-pw7f-949h-594r"}],"sources":{"cve":[{"id":"CVE-2024-21599","title":"Junos OS: MX Series: MPC3E memory leak with PTP configuration","description":"\nA Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf an MX Series device receives PTP packets on an MPC3E that doesn't support PTP this causes a memory leak which will result in unpredictable behavior and ultimately in an MPC crash and restart.\n\nTo monitor for this issue, please use the following FPC vty level commands:\n\nshow heap\nshows an increase in \"LAN buffer\" utilization and\n\nshow clksync ptp nbr-upd-info\nshows non-zero \"Pending PFEs\" counter.\n\nThis issue affects Juniper Networks Junos OS on MX Series with MPC3E:\n\n\n\n  *  All versions earlier than 20.4R3-S3;\n  *  21.1 versions earlier than 21.1R3-S4;\n  *  21.2 versions earlier than 21.2R3;\n  *  21.3 versions earlier than 21.3R2-S1, 21.3R3;\n  *  21.4 versions earlier than 21.4R2;\n  *  22.1 versions earlier than 22.1R2.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T00:53:23.497Z","modified":"2025-06-16T18:33:32.215Z","cvss":[{"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-401"],"updated_at":"2026-11-02T14:34:04.681315Z"}],"euvd":[{"id":"EUVD-2024-19247","description":"\nA Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf an MX Series device receives PTP packets on an MPC3E that doesn't support PTP this causes a memory leak which will result in unpredictable behavior and ultimately in an MPC crash and restart.\n\nTo monitor for this issue, please use the following FPC vty level commands:\n\nshow heap\nshows an increase in \"LAN buffer\" utilization and\n\nshow clksync ptp nbr-upd-info\nshows non-zero \"Pending PFEs\" counter.\n\nThis issue affects Juniper Networks Junos OS on MX Series with MPC3E:\n\n\n\n  *  All versions earlier than 20.4R3-S3;\n  *  21.1 versions earlier than 21.1R3-S4;\n  *  21.2 versions earlier than 21.2R3;\n  *  21.3 versions earlier than 21.3R2-S1, 21.3R3;\n  *  21.4 versions earlier than 21.4R2;\n  *  22.1 versions earlier than 22.1R2.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T00:53:23Z","modified":"2025-06-16T18:33:32Z","cvss":[{"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"}],"updated_at":"2026-11-02T20:32:23.224988Z"}],"ghsa":[{"id":"GHSA-pw7f-949h-594r","title":"\nA Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding...","description":"\nA Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf an MX Series device receives PTP packets on an MPC3E that doesn't support PTP this causes a memory leak which will result in unpredictable behavior and ultimately in an MPC crash and restart.\n\nTo monitor for this issue, please use the following FPC vty level commands:\n\nshow heap\nshows an increase in \"LAN buffer\" utilization and\n\nshow clksync ptp nbr-upd-info\nshows non-zero \"Pending PFEs\" counter.\n\nThis issue affects Juniper Networks Junos OS on MX Series with MPC3E:\n\n\n\n  *  All versions earlier than 20.4R3-S3;\n  *  21.1 versions earlier than 21.1R3-S4;\n  *  21.2 versions earlier than 21.2R3;\n  *  21.3 versions earlier than 21.3R2-S1, 21.3R3;\n  *  21.4 versions earlier than 21.4R2;\n  *  22.1 versions earlier than 22.1R2.\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":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-401"],"updated_at":"2026-11-02T14:55:23.490471Z"}],"nvd":[{"id":"CVE-2024-21599","description":"\nA Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf an MX Series device receives PTP packets on an MPC3E that doesn't support PTP this causes a memory leak which will result in unpredictable behavior and ultimately in an MPC crash and restart.\n\nTo monitor for this issue, please use the following FPC vty level commands:\n\nshow heap\nshows an increase in \"LAN buffer\" utilization and\n\nshow clksync ptp nbr-upd-info\nshows non-zero \"Pending PFEs\" counter.\n\nThis issue affects Juniper Networks Junos OS on MX Series with MPC3E:\n\n\n\n  *  All versions earlier than 20.4R3-S3;\n  *  21.1 versions earlier than 21.1R3-S4;\n  *  21.2 versions earlier than 21.2R3;\n  *  21.3 versions earlier than 21.3R2-S1, 21.3R3;\n  *  21.4 versions earlier than 21.4R2;\n  *  22.1 versions earlier than 22.1R2.\n\n\n\n\n\n\n","status":"published","published":"2024-01-12T01:15:47.66Z","modified":"2026-06-17T07:09:48.08Z","cvss":[{"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"},{"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":"primary"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:09:30.070039Z"}]}}