{"schemaVersion":3,"id":"CVE-2021-0209","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"In Juniper Networks Junos OS Evolved an attacker sending certain valid BGP update packets may cause Junos OS Evolved to access an uninitialized pointer causing RPD to core leading to a Denial of Service (DoS). Continued receipt of these types of valid BGP update packets will cause an extended Denial of Service condition. RPD will require a restart to recover. An indicator of compromise is to see if the file rpd.re exists by issuing the command: show system core-dumps This issue affects: Juniper Networks Junos OS Evolved 19.4 versions prior to 19.4R2-S2-EVO; 20.1 versions prior to 20.1R1-S2-EVO, 20.1R2-S1-EVO. This issue does not affect Junos OS.","dates":{"published":"2021-01-15T17:35:56.274Z","modified":"2024-09-17T03:32:29.054Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:A/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":6.5,"severity":"medium","vector":"CVSS:3.1/AV:A/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":6.5,"severity":"medium","vector":"CVSS:3.1/AV:A/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":5.7,"severity":"medium","vector":"AV:A/AC:M/Au:N/C:N/I:N/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00446,"percentile":0.37503,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.0050000000000000565,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00441},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00446,"percentile":0.37503}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00446,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00446,"percentile":0.37503}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-824","name":"Access of Uninitialized Pointer","description":"The product accesses or uses a pointer that has not been initialized.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/824.html"}],"affected":[{"vendor":"juniper networks","product":"junos os evolved","name":"Junos OS Evolved","label":"junos os evolved","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 19.4, < 19.4R2-S2-EVO","noFixRecorded":false,"fixedIn":null},{"text":"≥ 20.1, < 20.1R1-S2-EVO, 20.1R2-S1-EVO","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 19.4, < 19.4R2-S2-EVO | ≥ 20.1, < 20.1R1-S2-EVO, 20.1R2-S1-EVO","eol":null,"hubHref":"/vendor/juniper_networks/junos_os_evolved"},{"vendor":"juniper","product":"junos_os_evolved","name":"junos os evolved","label":"junos_os_evolved","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"19.4:r1","noFixRecorded":false,"fixedIn":null},{"text":"19.4:r2","noFixRecorded":false,"fixedIn":null},{"text":"19.4:r2-s1","noFixRecorded":false,"fixedIn":null},{"text":"20.1","noFixRecorded":false,"fixedIn":null},{"text":"20.1:r1","noFixRecorded":false,"fixedIn":null},{"text":"20.1:r1-s1","noFixRecorded":false,"fixedIn":null}],"versionsText":"19.4:r1 | 19.4:r2 | 19.4:r2-s1 | 20.1 | 20.1:r1 | 20.1:r1-s1","eol":null,"hubHref":"/vendor/juniper/junos_os_evolved"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://kb.juniper.net/JSA11099","label":"kb.juniper.net/JSA11099","hostname":"kb.juniper.net","tags":["X Refsource CONFIRM","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-01-15T17:35:56.274Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-09-17T03:32:29.054Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T15:31:18.347Z","stale":false,"partial":false}}