{"id":"CVE-2024-30390","aliases":["EUVD-2024-28311","GHSA-6w72-x59c-h2c9"],"status":"published","title":"Junos OS Evolved: Connection limits is not being enforced while the resp. rate limit is being enforced","description":"An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited Denial of Service (DoS) to the management plane.\n\nWhen an incoming connection was blocked because it exceeded the connections-per-second rate-limit, the system doesn't consider existing connections anymore for subsequent connection attempts so that the connection limit can be exceeded.\nThis issue affects Junos OS Evolved:\n\n\n\n  *  All versions before 21.4R3-S4-EVO,\n  *  22.1-EVO versions before 22.1R3-S3-EVO,\n  *  22.2-EVO versions before 22.2R3-S2-EVO, \n  *  22.3-EVO versions before 22.3R2-S1-EVO, 22.3R3-EVO.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0051,"percentile":0.43879,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-307"],"published":"2024-04-12T15:24:51Z","modified":"2026-06-17T07:26:52Z","products":[{"vendor":"juniper","product":"junos_os_evolved"},{"vendor":"juniper networks","product":"junos os evolved"}],"references":[{"url":"http://supportportal.juniper.net/JSA79183","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","tags":["technical-description","x_transferred","Issue Tracking"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-30390"},{"url":"https://github.com/advisories/GHSA-6w72-x59c-h2c9"}],"sources":{"cve":[{"id":"CVE-2024-30390","title":"Junos OS Evolved: Connection limits is not being enforced while the resp. rate limit is being enforced","description":"An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited Denial of Service (DoS) to the management plane.\n\nWhen an incoming connection was blocked because it exceeded the connections-per-second rate-limit, the system doesn't consider existing connections anymore for subsequent connection attempts so that the connection limit can be exceeded.\nThis issue affects Junos OS Evolved:\n\n\n\n  *  All versions before 21.4R3-S4-EVO,\n  *  22.1-EVO versions before 22.1R3-S3-EVO,\n  *  22.2-EVO versions before 22.2R3-S2-EVO, \n  *  22.3-EVO versions before 22.3R2-S1-EVO, 22.3R3-EVO.","status":"published","published":"2024-04-12T15:24:51.279Z","modified":"2024-08-02T01:32:07.113Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:34:07.482552Z"}],"euvd":[{"id":"EUVD-2024-28311","description":"An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited Denial of Service (DoS) to the management plane.\n\nWhen an incoming connection was blocked because it exceeded the connections-per-second rate-limit, the system doesn't consider existing connections anymore for subsequent connection attempts so that the connection limit can be exceeded.\nThis issue affects Junos OS Evolved:\n\n\n\n  *  All versions before 21.4R3-S4-EVO,\n  *  22.1-EVO versions before 22.1R3-S3-EVO,\n  *  22.2-EVO versions before 22.2R3-S2-EVO, \n  *  22.3-EVO versions before 22.3R2-S1-EVO, 22.3R3-EVO.","status":"published","published":"2024-04-12T15:24:51Z","modified":"2024-08-02T01:32:07Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-03T03:50:24.625974Z"}],"ghsa":[{"id":"GHSA-6w72-x59c-h2c9","title":"An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks...","description":"An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited Denial of Service (DoS) to the management plane.\n\nWhen an incoming connection was blocked because it exceeded the connections-per-second rate-limit, the system doesn't consider existing connections anymore for subsequent connection attempts so that the connection limit can be exceeded.\nThis issue affects Junos OS Evolved:\n\nAll versions before 21.4R3-S4-EVO,\n\n22.1-EVO versions before 22.1R3-S3-EVO,\n\n22.2-EVO versions before 22.2R3-S2-EVO, \n\n22.3-EVO versions before 22.3R2-S1-EVO, 22.3R3-EVO.","status":"published","published":"2024-04-12T18:33:26Z","modified":"2025-02-06T21:32:05Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:59:49.339987Z"}],"nvd":[{"id":"CVE-2024-30390","description":"An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited Denial of Service (DoS) to the management plane.\n\nWhen an incoming connection was blocked because it exceeded the connections-per-second rate-limit, the system doesn't consider existing connections anymore for subsequent connection attempts so that the connection limit can be exceeded.\nThis issue affects Junos OS Evolved:\n\n\n\n  *  All versions before 21.4R3-S4-EVO,\n  *  22.1-EVO versions before 22.1R3-S3-EVO,\n  *  22.2-EVO versions before 22.2R3-S2-EVO, \n  *  22.3-EVO versions before 22.3R2-S1-EVO, 22.3R3-EVO.","status":"published","published":"2024-04-12T16:15:38.54Z","modified":"2026-06-17T07:26:52.44Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:09:50.299382Z"}]}}