{"id":"CVE-2021-0209","state":"PUBLISHED","title":"Junos OS Evolved: Receipt of certain valid BGP update packets from BGP peers may cause RPD to core when using REGEX.","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.","publishedAt":"2021-01-15T17:35:56.274Z","updatedAt":"2024-09-17T03:32:29.054Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS Evolved"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS Evolved","versions":[{"version":"19.4","status":"affected","lessThan":"19.4R2-S2-EVO","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R1-S2-EVO, 20.1R2-S1-EVO","versionType":"custom"}]}],"references":["https://kb.juniper.net/JSA11099"],"weaknesses":["CWE-824"],"ingestedAt":"2026-10-29T19:47:50.134Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/0xxx/CVE-2021-0209.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-0209","state":"PUBLISHED","datePublished":"2021-01-15T17:35:56.274Z","dateUpdated":"2024-09-17T03:32:29.054Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2020-10-27T00:00:00.000Z"},"containers":{"cna":{"title":"Junos OS Evolved: Receipt of certain valid BGP update packets from BGP peers may cause RPD to core when using REGEX.","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS Evolved","versions":[{"version":"19.4","status":"affected","lessThan":"19.4R2-S2-EVO","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R1-S2-EVO, 20.1R2-S1-EVO","versionType":"custom"}]}],"references":[{"url":"https://kb.juniper.net/JSA11099","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-824","description":"CWE-824 Access of Uninitialized Pointer","lang":"en","type":"CWE"}]},{"descriptions":[{"description":"Denial of Service (DoS)","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"juniper","dateUpdated":"2021-01-15T17:35:56.000Z","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968"},"configurations":[{"lang":"en","value":"The following minimal configuration which will vary by implementation is necessary:\n\n* Must be running Junos OS Evolved\n* A BGP peering session is configured.\n* Regular expressions (REGEX) are being used with BGP."}],"datePublic":"2021-01-13T00:00:00.000Z","exploits":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 19.4R2-S2-EVO, 20.1R1-S2-EVO, 20.1R2-S1-EVO, 20.2R1-EVO and all subsequent releases."}],"source":{"advisory":"JSA11099","defect":["1517128"],"discovery":"USER"},"workarounds":[{"lang":"en","value":"There are no available workarounds for this issue."}],"x_generator":{"engine":"Vulnogram 0.0.9"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"sirt@juniper.net","DATE_PUBLIC":"2021-01-13T16:00:00.000Z","ID":"CVE-2021-0209","STATE":"PUBLIC","TITLE":"Junos OS Evolved: Receipt of certain valid BGP update packets from BGP peers may cause RPD to core when using REGEX."},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Junos OS Evolved","version":{"version_data":[{"version_affected":"<","version_name":"19.4","version_value":"19.4R2-S2-EVO"},{"version_affected":"<","version_name":"20.1","version_value":"20.1R1-S2-EVO, 20.1R2-S1-EVO"}]}}]},"vendor_name":"Juniper Networks"}]}},"configuration":[{"lang":"en","value":"The following minimal configuration which will vary by implementation is necessary:\n\n* Must be running Junos OS Evolved\n* A BGP peering session is configured.\n* Regular expressions (REGEX) are being used with BGP."}],"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"exploit":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"generator":{"engine":"Vulnogram 0.0.9"},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-824 Access of Uninitialized Pointer"}]},{"description":[{"lang":"eng","value":"Denial of Service (DoS)"}]}]},"references":{"reference_data":[{"name":"https://kb.juniper.net/JSA11099","refsource":"CONFIRM","url":"https://kb.juniper.net/JSA11099"}]},"solution":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 19.4R2-S2-EVO, 20.1R1-S2-EVO, 20.1R2-S1-EVO, 20.2R1-EVO and all subsequent releases."}],"source":{"advisory":"JSA11099","defect":["1517128"],"discovery":"USER"},"work_around":[{"lang":"en","value":"There are no available workarounds for this issue."}]}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://kb.juniper.net/JSA11099","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T15:32:10.126Z"}}]}}}