{"id":"CVE-2024-21617","aliases":["EUVD-2024-19265","GHSA-mmpf-h3x8-v558"],"status":"published","title":"Junos OS: BGP flap on NSR-enabled devices causes memory leak","description":"An Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause memory leak leading to Denial of Service (DoS).\n\nOn all Junos OS platforms, when NSR is enabled, a BGP flap will cause memory leak. A manual reboot of the system will restore the services.\n\nNote: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.\nThe memory usage can be monitored using the below commands.\n\nuser@host\u003e show chassis routing-engine no-forwarding\nuser@host\u003e show system memory | no-more\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  21.2 versions earlier than 21.2R3-S5;\n  *  21.3 versions earlier than 21.3R3-S4;\n  *  21.4 versions earlier than 21.4R3-S4;\n  *  22.1 versions earlier than 22.1R3-S2;\n  *  22.2 versions earlier than 22.2R3-S2;\n  *  22.3 versions earlier than 22.3R2-S1, 22.3R3;\n  *  22.4 versions earlier than 22.4R1-S2, 22.4R2.\n\n\n\n\nThis issue does not affect Junos OS versions earlier than 20.4R3-S7.","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":"2026-11-10","score":0.00284,"percentile":0.21121,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-459"],"published":"2024-01-12T00:57:00Z","modified":"2026-06-17T07:09:51Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA75758","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:N","tags":["technical-description","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21617"},{"url":"https://github.com/advisories/GHSA-mmpf-h3x8-v558"}],"sources":{"cve":[{"id":"CVE-2024-21617","title":"Junos OS: BGP flap on NSR-enabled devices causes memory leak","description":"\nAn Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause memory leak leading to Denial of Service (DoS).\n\nOn all Junos OS platforms, when NSR is enabled, a BGP flap will cause memory leak. A manual reboot of the system will restore the services.\n\nNote: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.\nThe memory usage can be monitored using the below commands.\n\nuser@host\u003e show chassis routing-engine no-forwarding\nuser@host\u003e show system memory | no-more\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  21.2 versions earlier than 21.2R3-S5;\n  *  21.3 versions earlier than 21.3R3-S4;\n  *  21.4 versions earlier than 21.4R3-S4;\n  *  22.1 versions earlier than 22.1R3-S2;\n  *  22.2 versions earlier than 22.2R3-S2;\n  *  22.3 versions earlier than 22.3R2-S1, 22.3R3;\n  *  22.4 versions earlier than 22.4R1-S2, 22.4R2.\n\n\n\n\nThis issue does not affect Junos OS versions earlier than 20.4R3-S7.\n\n\n\n","status":"published","published":"2024-01-12T00:57:00.195Z","modified":"2025-06-17T21:09:20.967Z","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-459"],"updated_at":"2026-11-02T14:34:04.681315Z"}],"euvd":[{"id":"EUVD-2024-19265","description":"\nAn Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause memory leak leading to Denial of Service (DoS).\n\nOn all Junos OS platforms, when NSR is enabled, a BGP flap will cause memory leak. A manual reboot of the system will restore the services.\n\nNote: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.\nThe memory usage can be monitored using the below commands.\n\nuser@host\u003e show chassis routing-engine no-forwarding\nuser@host\u003e show system memory | no-more\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  21.2 versions earlier than 21.2R3-S5;\n  *  21.3 versions earlier than 21.3R3-S4;\n  *  21.4 versions earlier than 21.4R3-S4;\n  *  22.1 versions earlier than 22.1R3-S2;\n  *  22.2 versions earlier than 22.2R3-S2;\n  *  22.3 versions earlier than 22.3R2-S1, 22.3R3;\n  *  22.4 versions earlier than 22.4R1-S2, 22.4R2.\n\n\n\n\nThis issue does not affect Junos OS versions earlier than 20.4R3-S7.\n\n\n\n","status":"published","published":"2024-01-12T00:57:00Z","modified":"2025-06-17T21:09:20Z","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":"2026-11-02T20:32:21.531807Z"}],"ghsa":[{"id":"GHSA-mmpf-h3x8-v558","title":"\nAn Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper...","description":"\nAn Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause memory leak leading to Denial of Service (DoS).\n\nOn all Junos OS platforms, when NSR is enabled, a BGP flap will cause memory leak. A manual reboot of the system will restore the services.\n\nThe memory usage can be monitored using the below commands.\n\nuser@host\u003e show chassis routing-engine no-forwarding\nuser@host\u003e show system memory | no-more\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  21.2 versions earlier than 21.2R3-S5;\n  *  21.3 versions earlier than 21.3R3-S4;\n  *  21.4 versions earlier than 21.4R3-S4;\n  *  22.1 versions earlier than 22.1R3-S2;\n  *  22.2 versions earlier than 22.2R3-S2;\n  *  22.3 versions earlier than 22.3R2-S1, 22.3R3;\n  *  22.4 versions earlier than 22.4R1-S2, 22.4R2.\n\n\n\n\nThis issue does not affect Junos OS versions earlier than 20.4R3-S7.\n\n\n\n","status":"published","published":"2024-01-12T03:30:49Z","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-459"],"updated_at":"2026-11-02T14:55:23.490471Z"}],"nvd":[{"id":"CVE-2024-21617","description":"\nAn Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause memory leak leading to Denial of Service (DoS).\n\nOn all Junos OS platforms, when NSR is enabled, a BGP flap will cause memory leak. A manual reboot of the system will restore the services.\n\nNote: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.\nThe memory usage can be monitored using the below commands.\n\nuser@host\u003e show chassis routing-engine no-forwarding\nuser@host\u003e show system memory | no-more\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  21.2 versions earlier than 21.2R3-S5;\n  *  21.3 versions earlier than 21.3R3-S4;\n  *  21.4 versions earlier than 21.4R3-S4;\n  *  22.1 versions earlier than 22.1R3-S2;\n  *  22.2 versions earlier than 22.2R3-S2;\n  *  22.3 versions earlier than 22.3R2-S1, 22.3R3;\n  *  22.4 versions earlier than 22.4R1-S2, 22.4R2.\n\n\n\n\nThis issue does not affect Junos OS versions earlier than 20.4R3-S7.\n\n\n\n","status":"published","published":"2024-01-12T01:15:50.23Z","modified":"2026-06-17T07:09:51.113Z","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-459"],"updated_at":"2026-11-02T14:09:30.070039Z"}]}}