{"id":"CVE-2021-31377","state":"PUBLISHED","title":"Junos OS: A local authenticated attacker can cause RPD to core","description":"An Incorrect Permission Assignment for Critical Resource vulnerability of a certain file in the filesystem of Junos OS allows a local authenticated attacker to cause routing process daemon (RPD) to crash and restart, causing a Denial of Service (DoS). Repeated actions by the attacker will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S7; 19.1 versions prior to 19.1R2-S3, 19.1R3-S5; 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-S2; 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 20.3R3; 20.4 versions prior to 20.4R1-S1, 20.4R2.","publishedAt":"2021-10-19T18:17:16.577Z","updatedAt":"2024-09-16T17:28:14.973Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"15.1","status":"affected","lessThan":"15.1R7-S9","versionType":"custom"},{"version":"17.3","status":"affected","lessThan":"17.3R3-S12","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R2-S13, 17.4R3-S5","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R3-S13","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R3-S8","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R3-S5","versionType":"custom"},{"version":"18.4","status":"affected","lessThan":"18.4R2-S8, 18.4R3-S7","versionType":"custom"},{"version":"19.1","status":"affected","lessThan":"19.1R2-S3, 19.1R3-S5","versionType":"custom"},{"version":"19.2","status":"affected","lessThan":"19.2R3-S2","versionType":"custom"},{"version":"19.3","status":"affected","lessThan":"19.3R2-S6, 19.3R3-S2","versionType":"custom"},{"version":"19.4","status":"affected","lessThan":"19.4R1-S4, 19.4R2-S4, 19.4R3-S2","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R2-S2, 20.1R3","versionType":"custom"},{"version":"20.2","status":"affected","lessThan":"20.2R2-S3, 20.2R3","versionType":"custom"},{"version":"20.3","status":"affected","lessThan":"20.3R3","versionType":"custom"},{"version":"20.4","status":"affected","lessThan":"20.4R1-S1, 20.4R2","versionType":"custom"}]}],"references":["https://kb.juniper.net/JSA11242"],"weaknesses":["CWE-732"],"ingestedAt":"2026-10-29T19:48:30.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/31xxx/CVE-2021-31377.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-31377","state":"PUBLISHED","datePublished":"2021-10-19T18:17:16.577Z","dateUpdated":"2024-09-16T17:28:14.973Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2021-04-15T00:00:00.000Z"},"containers":{"cna":{"title":"Junos OS: A local authenticated attacker can cause RPD to core","descriptions":[{"lang":"en","value":"An Incorrect Permission Assignment for Critical Resource vulnerability of a certain file in the filesystem of Junos OS allows a local authenticated attacker to cause routing process daemon (RPD) to crash and restart, causing a Denial of Service (DoS). Repeated actions by the attacker will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S7; 19.1 versions prior to 19.1R2-S3, 19.1R3-S5; 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-S2; 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 20.3R3; 20.4 versions prior to 20.4R1-S1, 20.4R2."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"15.1","status":"affected","lessThan":"15.1R7-S9","versionType":"custom"},{"version":"17.3","status":"affected","lessThan":"17.3R3-S12","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R2-S13, 17.4R3-S5","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R3-S13","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R3-S8","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R3-S5","versionType":"custom"},{"version":"18.4","status":"affected","lessThan":"18.4R2-S8, 18.4R3-S7","versionType":"custom"},{"version":"19.1","status":"affected","lessThan":"19.1R2-S3, 19.1R3-S5","versionType":"custom"},{"version":"19.2","status":"affected","lessThan":"19.2R3-S2","versionType":"custom"},{"version":"19.3","status":"affected","lessThan":"19.3R2-S6, 19.3R3-S2","versionType":"custom"},{"version":"19.4","status":"affected","lessThan":"19.4R1-S4, 19.4R2-S4, 19.4R3-S2","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R2-S2, 20.1R3","versionType":"custom"},{"version":"20.2","status":"affected","lessThan":"20.2R2-S3, 20.2R3","versionType":"custom"},{"version":"20.3","status":"affected","lessThan":"20.3R3","versionType":"custom"},{"version":"20.4","status":"affected","lessThan":"20.4R1-S1, 20.4R2","versionType":"custom"}]}],"references":[{"url":"https://kb.juniper.net/JSA11242","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-732","description":"CWE-732 Incorrect Permission Assignment for Critical Resource","lang":"en","type":"CWE"}]},{"descriptions":[{"description":"Denial of Service (DoS)","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"juniper","dateUpdated":"2021-10-19T18:17:16.000Z","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968"},"datePublic":"2021-10-13T00:00:00.000Z","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: 15.1R7-S9, 17.3R3-S12, 17.4R2-S13, 17.4R3-S5, 18.1R3-S13, 18.2R3-S8, 18.3R3-S5, 18.4R2-S8, 18.4R3-S7, 19.1R3-S5, 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R2-S4, 19.4R3-S2, 20.1R2-S2, 20.1R3, 20.2R2-S3, 20.2R3, 20.3R3, 20.4R1-S1, 20.4R2, 21.1R1, and all subsequent releases."}],"source":{"advisory":"JSA11242","defect":["1543261"],"discovery":"INTERNAL"},"workarounds":[{"lang":"en","value":"To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted administrative networks, hosts and users."}],"x_generator":{"engine":"Vulnogram 0.0.9"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"sirt@juniper.net","DATE_PUBLIC":"2021-10-13T16:00:00.000Z","ID":"CVE-2021-31377","STATE":"PUBLIC","TITLE":"Junos OS: A local authenticated attacker can cause RPD to core"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Junos OS","version":{"version_data":[{"version_affected":"<","version_name":"15.1","version_value":"15.1R7-S9"},{"version_affected":"<","version_name":"17.3","version_value":"17.3R3-S12"},{"version_affected":"<","version_name":"17.4","version_value":"17.4R2-S13, 17.4R3-S5"},{"version_affected":"<","version_name":"18.1","version_value":"18.1R3-S13"},{"version_affected":"<","version_name":"18.2","version_value":"18.2R3-S8"},{"version_affected":"<","version_name":"18.3","version_value":"18.3R3-S5"},{"version_affected":"<","version_name":"18.4","version_value":"18.4R2-S8, 18.4R3-S7"},{"version_affected":"<","version_name":"19.1","version_value":"19.1R2-S3, 19.1R3-S5"},{"version_affected":"<","version_name":"19.2","version_value":"19.2R3-S2"},{"version_affected":"<","version_name":"19.3","version_value":"19.3R2-S6, 19.3R3-S2"},{"version_affected":"<","version_name":"19.4","version_value":"19.4R1-S4, 19.4R2-S4, 19.4R3-S2"},{"version_affected":"<","version_name":"20.1","version_value":"20.1R2-S2, 20.1R3"},{"version_affected":"<","version_name":"20.2","version_value":"20.2R2-S3, 20.2R3"},{"version_affected":"<","version_name":"20.3","version_value":"20.3R3"},{"version_affected":"<","version_name":"20.4","version_value":"20.4R1-S1, 20.4R2"}]}}]},"vendor_name":"Juniper Networks"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An Incorrect Permission Assignment for Critical Resource vulnerability of a certain file in the filesystem of Junos OS allows a local authenticated attacker to cause routing process daemon (RPD) to crash and restart, causing a Denial of Service (DoS). Repeated actions by the attacker will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S7; 19.1 versions prior to 19.1R2-S3, 19.1R3-S5; 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-S2; 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 20.3R3; 20.4 versions prior to 20.4R1-S1, 20.4R2."}]},"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":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-732 Incorrect Permission Assignment for Critical Resource"}]},{"description":[{"lang":"eng","value":"Denial of Service (DoS)"}]}]},"references":{"reference_data":[{"name":"https://kb.juniper.net/JSA11242","refsource":"CONFIRM","url":"https://kb.juniper.net/JSA11242"}]},"solution":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: 15.1R7-S9, 17.3R3-S12, 17.4R2-S13, 17.4R3-S5, 18.1R3-S13, 18.2R3-S8, 18.3R3-S5, 18.4R2-S8, 18.4R3-S7, 19.1R3-S5, 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R2-S4, 19.4R3-S2, 20.1R2-S2, 20.1R3, 20.2R2-S3, 20.2R3, 20.3R3, 20.4R1-S1, 20.4R2, 21.1R1, and all subsequent releases."}],"source":{"advisory":"JSA11242","defect":["1543261"],"discovery":"INTERNAL"},"work_around":[{"lang":"en","value":"To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted administrative networks, hosts and users."}]}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://kb.juniper.net/JSA11242","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T22:55:53.755Z"}}]}}}