{"schemaVersion":3,"id":"CVE-2021-31383","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"In Point to MultiPoint (P2MP) scenarios within established sessions between network or adjacent neighbors the improper use of a source to destination copy write operation combined with a Stack-based Buffer Overflow on certain specific packets processed by the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved sent by a remote unauthenticated network attacker causes the RPD to crash causing a Denial of Service (DoS). Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R2-S3, 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R1. Juniper Networks Junos OS Evolved 20.1 versions prior to 20.1R3-EVO; 20.2 versions prior to 20.2R3-EVO; 20.3 versions prior to 20.3R2-EVO.","dates":{"published":"2021-10-19T18:17:26.471Z","modified":"2024-09-16T20:21:34.268Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01006,"percentile":0.62418,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01006},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01006,"percentile":0.62418}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01006,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01006,"percentile":null},{"d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