{"id":"CVE-2023-44184","aliases":["EUVD-2023-48543","GHSA-c9pj-4j3g-856x"],"status":"published","title":"Junos OS and Junos OS Evolved: High CPU load due to specific NETCONF command","description":"An Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the management daemon (mgd) process of Juniper Networks Junos OS and Junos OS Evolved allows a network-based authenticated low-privileged attacker, by executing a specific command via NETCONF, to cause a CPU Denial of Service to the device's control plane.\n\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  All versions prior to 20.4R3-S7;\n  *  21.2 versions prior to 21.2R3-S5;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S4;\n  *  22.1 versions prior to 22.1R3-S2;\n  *  22.2 versions prior to 22.2R3;\n  *  22.3 versions prior to 22.3R2-S1, 22.3R3;\n  *  22.4 versions prior to 22.4R1-S2, 22.4R2.\n\n\n\n\nJuniper Networks Junos OS Evolved\n\n\n\n  *  All versions prior to 21.4R3-S4-EVO;\n  *  22.1 versions prior to 22.1R3-S2-EVO;\n  *  22.2 versions prior to 22.2R3-EVO;\n  *  22.3 versions prior to 22.3R3-EVO;\n  *  22.4 versions prior to 22.4R2-EVO.\n\n\n\n\nAn indicator of compromise can be seen by first determining if the NETCONF client is logged in and fails to log out after a reasonable period of time and secondly reviewing the WCPU percentage for the mgd process by running the following command:\n\nmgd process example:\n\nuser@device-re#\u003e show system processes extensive | match \"mgd|PID\" | except last\nPID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND\n92476 root 100 0 500M 89024K CPU3 3 57.5H 89.60% mgd \u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c review the high cpu percentage.\nExample to check for NETCONF activity:\n\nWhile there is no specific command that shows a specific session in use for NETCONF, you can review logs for UI_LOG_EVENT with \"client-mode 'netconf'\"\n\nFor example:\n\nmgd[38121]: UI_LOGIN_EVENT: User 'root' login, class 'super-user' [38121], ssh-connection '10.1.1.1 201 55480 10.1.1.2 22', client-mode 'netconf'","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/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":0.00605,"percentile":0.49304,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2023-10-12T23:02:34Z","modified":"2026-06-17T06:27:04Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper","product":"junos_os_evolved"},{"vendor":"juniper networks","product":"junos os"},{"vendor":"juniper networks","product":"junos os evolved"}],"references":[{"url":"https://supportportal.juniper.net/JSA73147","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44184"},{"url":"https://github.com/advisories/GHSA-c9pj-4j3g-856x"}],"sources":{"cve":[{"id":"CVE-2023-44184","title":"Junos OS and Junos OS Evolved: High CPU load due to specific NETCONF command","description":"\nAn Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the management daemon (mgd) process of Juniper Networks Junos OS and Junos OS Evolved allows a network-based authenticated low-privileged attacker, by executing a specific command via NETCONF, to cause a CPU Denial of Service to the device's control plane.\n\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  All versions prior to 20.4R3-S7;\n  *  21.2 versions prior to 21.2R3-S5;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S4;\n  *  22.1 versions prior to 22.1R3-S2;\n  *  22.2 versions prior to 22.2R3;\n  *  22.3 versions prior to 22.3R2-S1, 22.3R3;\n  *  22.4 versions prior to 22.4R1-S2, 22.4R2.\n\n\n\n\nJuniper Networks Junos OS Evolved\n\n\n\n  *  All versions prior to 21.4R3-S4-EVO;\n  *  22.1 versions prior to 22.1R3-S2-EVO;\n  *  22.2 versions prior to 22.2R3-EVO;\n  *  22.3 versions prior to 22.3R3-EVO;\n  *  22.4 versions prior to 22.4R2-EVO.\n\n\n\n\nAn indicator of compromise can be seen by first determining if the NETCONF client is logged in and fails to log out after a reasonable period of time and secondly reviewing the WCPU percentage for the mgd process by running the following command:\n\nmgd process example:\n\nuser@device-re#\u003e show system processes extensive | match \"mgd|PID\" | except last\nPID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND\n92476 root 100 0 500M 89024K CPU3 3 57.5H 89.60% mgd \u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c review the high cpu percentage.\nExample to check for NETCONF activity:\n\nWhile there is no specific command that shows a specific session in use for NETCONF, you can review logs for UI_LOG_EVENT with \"client-mode 'netconf'\"\n\nFor example:\n\nmgd[38121]: UI_LOGIN_EVENT: User 'root' login, class 'super-user' [38121], ssh-connection '10.1.1.1 201 55480 10.1.1.2 22', client-mode 'netconf'\n\n","status":"published","published":"2023-10-12T23:02:34.571Z","modified":"2024-09-17T16:11:00.874Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:35:21.612665Z"}],"euvd":[{"id":"EUVD-2023-48543","description":"\nAn Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the management daemon (mgd) process of Juniper Networks Junos OS and Junos OS Evolved allows a network-based authenticated low-privileged attacker, by executing a specific command via NETCONF, to cause a CPU Denial of Service to the device's control plane.\n\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  All versions prior to 20.4R3-S7;\n  *  21.2 versions prior to 21.2R3-S5;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S4;\n  *  22.1 versions prior to 22.1R3-S2;\n  *  22.2 versions prior to 22.2R3;\n  *  22.3 versions prior to 22.3R2-S1, 22.3R3;\n  *  22.4 versions prior to 22.4R1-S2, 22.4R2.\n\n\n\n\nJuniper Networks Junos OS Evolved\n\n\n\n  *  All versions prior to 21.4R3-S4-EVO;\n  *  22.1 versions prior to 22.1R3-S2-EVO;\n  *  22.2 versions prior to 22.2R3-EVO;\n  *  22.3 versions prior to 22.3R3-EVO;\n  *  22.4 versions prior to 22.4R2-EVO.\n\n\n\n\nAn indicator of compromise can be seen by first determining if the NETCONF client is logged in and fails to log out after a reasonable period of time and secondly reviewing the WCPU percentage for the mgd process by running the following command:\n\nmgd process example:\n\nuser@device-re#\u003e show system processes extensive | match \"mgd|PID\" | except last\nPID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND\n92476 root 100 0 500M 89024K CPU3 3 57.5H 89.60% mgd \u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c review the high cpu percentage.\nExample to check for NETCONF activity:\n\nWhile there is no specific command that shows a specific session in use for NETCONF, you can review logs for UI_LOG_EVENT with \"client-mode 'netconf'\"\n\nFor example:\n\nmgd[38121]: UI_LOGIN_EVENT: User 'root' login, class 'super-user' [38121], ssh-connection '10.1.1.1 201 55480 10.1.1.2 22', client-mode 'netconf'\n\n","status":"published","published":"2023-10-12T23:02:34Z","modified":"2024-09-17T16:11:00Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:28:21.906955Z"}],"ghsa":[{"id":"GHSA-c9pj-4j3g-856x","title":"\nAn Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the...","description":"\nAn Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the management daemon (mgd) process of Juniper Networks Junos OS and Junos OS Evolved allows a network-based authenticated low-privileged attacker, by executing a specific command via NETCONF, to cause a CPU Denial of Service to the device's control plane.\n\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  All versions prior to 20.4R3-S7;\n  *  21.2 versions prior to 21.2R3-S5;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S4;\n  *  22.1 versions prior to 22.1R3-S2;\n  *  22.2 versions prior to 22.2R3;\n  *  22.3 versions prior to 22.3R2-S1, 22.3R3;\n  *  22.4 versions prior to 22.4R1-S2, 22.4R2.\n\n\n\n\nJuniper Networks Junos OS Evolved\n\n\n\n  *  All versions prior to 21.4R3-S4-EVO;\n  *  22.1 versions prior to 22.1R3-S2-EVO;\n  *  22.2 versions prior to 22.2R3-EVO;\n  *  22.3 versions prior to 22.3R3-EVO;\n  *  22.4 versions prior to 22.4R2-EVO.\n\n\n\n\nAn indicator of compromise can be seen by first determining if the NETCONF client is logged in and fails to log out after a reasonable period of time and secondly reviewing the WCPU percentage for the mgd process by running the following command:\n\nmgd process example:\n\nuser@device-re#\u003e show system processes extensive | match \"mgd|PID\" | except last\nPID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND\n92476 root 100 0 500M 89024K CPU3 3 57.5H 89.60% mgd \u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c review the high cpu percentage.\nExample to check for NETCONF activity:\n\nWhile there is no specific command that shows a specific session in use for NETCONF, you can review logs for UI_LOG_EVENT with \"client-mode 'netconf'\"\n\nFor example:\n\nmgd[38121]: UI_LOGIN_EVENT: User 'root' login, class 'super-user' [38121], ssh-connection '10.1.1.1 201 55480 10.1.1.2 22', client-mode 'netconf'\n\n","status":"published","published":"2023-10-13T00:30:19Z","modified":"2024-04-04T08:36:47Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:56:59.652212Z"}],"nvd":[{"id":"CVE-2023-44184","description":"\nAn Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the management daemon (mgd) process of Juniper Networks Junos OS and Junos OS Evolved allows a network-based authenticated low-privileged attacker, by executing a specific command via NETCONF, to cause a CPU Denial of Service to the device's control plane.\n\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  All versions prior to 20.4R3-S7;\n  *  21.2 versions prior to 21.2R3-S5;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S4;\n  *  22.1 versions prior to 22.1R3-S2;\n  *  22.2 versions prior to 22.2R3;\n  *  22.3 versions prior to 22.3R2-S1, 22.3R3;\n  *  22.4 versions prior to 22.4R1-S2, 22.4R2.\n\n\n\n\nJuniper Networks Junos OS Evolved\n\n\n\n  *  All versions prior to 21.4R3-S4-EVO;\n  *  22.1 versions prior to 22.1R3-S2-EVO;\n  *  22.2 versions prior to 22.2R3-EVO;\n  *  22.3 versions prior to 22.3R3-EVO;\n  *  22.4 versions prior to 22.4R2-EVO.\n\n\n\n\nAn indicator of compromise can be seen by first determining if the NETCONF client is logged in and fails to log out after a reasonable period of time and secondly reviewing the WCPU percentage for the mgd process by running the following command:\n\nmgd process example:\n\nuser@device-re#\u003e show system processes extensive | match \"mgd|PID\" | except last\nPID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND\n92476 root 100 0 500M 89024K CPU3 3 57.5H 89.60% mgd \u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c\u003c review the high cpu percentage.\nExample to check for NETCONF activity:\n\nWhile there is no specific command that shows a specific session in use for NETCONF, you can review logs for UI_LOG_EVENT with \"client-mode 'netconf'\"\n\nFor example:\n\nmgd[38121]: UI_LOGIN_EVENT: User 'root' login, class 'super-user' [38121], ssh-connection '10.1.1.1 201 55480 10.1.1.2 22', client-mode 'netconf'\n\n","status":"published","published":"2023-10-13T00:15:12.067Z","modified":"2026-06-17T06:27:04.25Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/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:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:08:37.83429Z"}]}}