{"id":"CVE-2023-44199","aliases":["EUVD-2023-48558","GHSA-j62j-mjvg-xgrq"],"status":"published","title":"Junos OS: MX Series: In a PTP scenario a prolonged routing protocol churn can trigger an FPC reboot","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nOn Junos MX Series platforms with Precision Time Protocol (PTP) configured, a prolonged routing protocol churn can lead to an FPC crash and restart.\n\nThis issue affects Juniper Networks Junos OS on MX Series:\n\n\n\n  *  All versions prior to 20.4R3-S4;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S2;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3;\n  *  22.1 versions prior to 22.1R3;\n  *  22.2 versions prior to 22.2R1-S1, 22.2R2.","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":0.00644,"percentile":0.51202,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-754"],"published":"2023-10-12T23:05:52Z","modified":"2026-06-17T06:27:06Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"},{"vendor":"juniper_networks","product":"junos_os"}],"references":[{"url":"https://supportportal.juniper.net/JSA73165","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44199"},{"url":"https://github.com/advisories/GHSA-j62j-mjvg-xgrq"}],"sources":{"cve":[{"id":"CVE-2023-44199","title":"Junos OS: MX Series: In a PTP scenario a prolonged routing protocol churn can trigger an FPC reboot","description":"\nAn Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nOn Junos MX Series platforms with Precision Time Protocol (PTP) configured, a prolonged routing protocol churn can lead to an FPC crash and restart.\n\nThis issue affects Juniper Networks Junos OS on MX Series:\n\n\n\n  *  All versions prior to 20.4R3-S4;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S2;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3;\n  *  22.1 versions prior to 22.1R3;\n  *  22.2 versions prior to 22.2R1-S1, 22.2R2.\n\n\n\n\n\n\n","status":"published","published":"2023-10-12T23:05:52.303Z","modified":"2024-09-18T14:33:48.227Z","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-754"],"updated_at":"2026-11-02T14:35:21.612665Z"}],"euvd":[{"id":"EUVD-2023-48558","description":"\nAn Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nOn Junos MX Series platforms with Precision Time Protocol (PTP) configured, a prolonged routing protocol churn can lead to an FPC crash and restart.\n\nThis issue affects Juniper Networks Junos OS on MX Series:\n\n\n\n  *  All versions prior to 20.4R3-S4;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S2;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3;\n  *  22.1 versions prior to 22.1R3;\n  *  22.2 versions prior to 22.2R1-S1, 22.2R2.\n\n\n\n\n\n\n","status":"published","published":"2023-10-12T23:05:52Z","modified":"2024-09-18T14:33:48Z","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-j62j-mjvg-xgrq","title":"\nAn Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding...","description":"\nAn Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nOn Junos MX Series platforms with Precision Time Protocol (PTP) configured, a prolonged routing protocol churn can lead to an FPC crash and restart.\n\nThis issue affects Juniper Networks Junos OS on MX Series:\n\n\n\n  *  All versions prior to 20.4R3-S4;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S2;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3;\n  *  22.1 versions prior to 22.1R3;\n  *  22.2 versions prior to 22.2R1-S1, 22.2R2.\n\n\n\n\n\n\n","status":"published","published":"2023-10-13T00:30:19Z","modified":"2024-04-04T08:37:14Z","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-754"],"updated_at":"2026-11-02T14:56:59.652212Z"}],"nvd":[{"id":"CVE-2023-44199","description":"\nAn Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nOn Junos MX Series platforms with Precision Time Protocol (PTP) configured, a prolonged routing protocol churn can lead to an FPC crash and restart.\n\nThis issue affects Juniper Networks Junos OS on MX Series:\n\n\n\n  *  All versions prior to 20.4R3-S4;\n  *  21.1 version 21.1R1 and later versions;\n  *  21.2 versions prior to 21.2R3-S2;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3;\n  *  22.1 versions prior to 22.1R3;\n  *  22.2 versions prior to 22.2R1-S1, 22.2R2.\n\n\n\n\n\n\n","status":"published","published":"2023-10-13T00:15:12.837Z","modified":"2026-06-17T06:27:06.93Z","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-754"],"updated_at":"2026-11-02T14:08:37.83429Z"}]}}