CVE-2021-31351

{"containers": {"cna": {"affected": [{"product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "15.1", "status": "unaffected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "17.3R3-S11", "status": "unaffected", "version": "17.3", "versionType": "custom"}, {"lessThan": "17.4*", "status": "unaffected", "version": "17.4R3", "versionType": "custom"}]}, {"platforms": ["MX Series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"status": "affected", "version": "17.3R3-S11"}, {"status": "affected", "version": "18.1R3-S12"}, {"status": "affected", "version": "18.3R3-S4"}, {"status": "affected", "version": "18.4R3-S7"}, {"status": "affected", "version": "19.1R3-S4, 19.1R3-S5"}, {"status": "affected", "version": "19.2R1-S6"}, {"status": "affected", "version": "19.3R3-S2"}, {"status": "affected", "version": "19.4R3-S2"}, {"status": "affected", "version": "20.1R2-S1"}, {"status": "affected", "version": "20.2R3"}, {"status": "affected", "version": "20.3R2"}, {"lessThan": "17.4*", "status": "affected", "version": "17.4R2-S13", "versionType": "custom"}, {"lessThan": "18.2*", "status": "affected", "version": "18.2R2-S8, 18.2R3-S7", "versionType": "custom"}, {"lessThan": "18.4*", "status": "affected", "version": "18.4R1-S8, 18.4R2-S7", "versionType": "custom"}, {"lessThan": "19.4*", "status": "affected", "version": "19.4R2-S4", "versionType": "custom"}, {"lessThan": "20.2*", "status": "affected", "version": "20.2R2-S2", "versionType": "custom"}, {"lessThan": "20.3*", "status": "affected", "version": "20.3R1-S2", "versionType": "custom"}, {"lessThan": "20.4R2-S1, 20.4R3", "status": "affected", "version": "20.4", "versionType": "custom"}, {"lessThan": "21.1R1-S1, 21.1R2", "status": "affected", "version": "21.1", "versionType": "custom"}]}], "datePublic": "2021-10-13T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;"}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-754", "description": "CWE-754 Improper Check for Unusual or Exceptional Conditions", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"description": "Denial of Service (DoS)", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-10-19T18:16:31.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA11216"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S12, 17.4R3-S5, 18.1R3-S13, 18.3R3-S5, 18.4R3-S8, 19.1R3-S6, 19.2R1-S7, 19.2R3-S2, 19.3R2-S6, 19.3R3-S3, 19.4R3-S3, 20.1R2-S2, 20.1R3, 20.2R3-S1, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1, and all subsequent releases.\n\nNote: Only those releases listed in the PROBLEM section above are affected. This fix has also been proactively committed into other releases that are not vulnerable to this issue."}], "source": {"advisory": "JSA11216", "defect": ["1577814"], "discovery": "USER"}, "title": "Junos OS: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset", "workarounds": [{"lang": "en", "value": "There are no viable workarounds for this issue."}], "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-2021-31351", "STATE": "PUBLIC", "TITLE": "Junos OS: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"version_affected": "!<", "version_value": "15.1"}, {"version_affected": "!<", "version_name": "17.3", "version_value": "17.3R3-S11"}, {"platform": "MX Series", "version_affected": "=", "version_value": "17.3R3-S11"}, {"platform": "MX Series", "version_affected": ">=", "version_name": "17.4", "version_value": "17.4R2-S13"}, {"version_affected": "!>=", "version_name": "17.4", "version_value": "17.4R3"}, {"platform": "MX Series", "version_affected": "=", "version_value": "18.1R3-S12"}, {"platform": "MX Series", "version_affected": ">=", "version_name": "18.2", "version_value": "18.2R2-S8, 18.2R3-S7"}, {"platform": "MX Series", "version_affected": "=", "version_value": "18.3R3-S4"}, {"platform": "MX Series", "version_affected": ">=", "version_name": "18.4", "version_value": "18.4R1-S8, 18.4R2-S7"}, {"platform": "MX Series", "version_affected": "=", "version_name": "18.4", "version_value": "18.4R3-S7"}, {"platform": "MX Series", "version_affected": "=", "version_name": "19.1", "version_value": "19.1R3-S4, 19.1R3-S5"}, {"platform": "MX Series", "version_affected": "=", "version_name": "19.2", "version_value": "19.2R1-S6"}, {"platform": "MX Series", "version_affected": "=", "version_name": "19.3", "version_value": "19.3R3-S2"}, {"platform": "MX Series", "version_affected": ">=", "version_name": "19.4", "version_value": "19.4R2-S4"}, {"platform": "MX Series", "version_affected": "=", "version_name": "19.4", "version_value": "19.4R3-S2"}, {"platform": "MX Series", "version_affected": "=", "version_name": "20.1", "version_value": "20.1R2-S1"}, {"platform": "MX Series", "version_affected": ">=", "version_name": "20.2", "version_value": "20.2R2-S2"}, {"platform": "MX Series", "version_affected": "=", "version_name": "20.2", "version_value": "20.2R3"}, {"platform": "MX Series", "version_affected": ">=", "version_name": "20.3", "version_value": "20.3R1-S2"}, {"platform": "MX Series", "version_affected": "=", "version_name": "20.3", "version_value": "20.3R2"}, {"platform": "MX Series", "version_affected": "<", "version_name": "20.4", "version_value": "20.4R2-S1, 20.4R3"}, {"platform": "MX Series", "version_affected": "<", "version_name": "21.1", "version_value": "21.1R1-S1, 21.1R2"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;"}]}, "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": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/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-754 Improper Check for Unusual or Exceptional Conditions"}]}, {"description": [{"lang": "eng", "value": "Denial of Service (DoS)"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA11216", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA11216"}]}, "solution": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S12, 17.4R3-S5, 18.1R3-S13, 18.3R3-S5, 18.4R3-S8, 19.1R3-S6, 19.2R1-S7, 19.2R3-S2, 19.3R2-S6, 19.3R3-S3, 19.4R3-S3, 20.1R2-S2, 20.1R3, 20.2R3-S1, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1, and all subsequent releases.\n\nNote: Only those releases listed in the PROBLEM section above are affected. 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"C982A2FF-A1F9-4830-BAB6-77CFCE1F093F", "vulnerable": false}, {"criteria": "cpe:2.3:h:juniper:mx480:-:*:*:*:*:*:*:*", "matchCriteriaId": "104858BD-D31D-40E0-8524-2EC311F10EAC", "vulnerable": false}, {"criteria": "cpe:2.3:h:juniper:mx5:-:*:*:*:*:*:*:*", "matchCriteriaId": "3B557965-0040-4048-B56C-F564FF28635B", "vulnerable": false}, {"criteria": "cpe:2.3:h:juniper:mx80:-:*:*:*:*:*:*:*", "matchCriteriaId": "EB875EBD-A3CD-4466-B2A3-39D47FF94592", "vulnerable": false}, {"criteria": "cpe:2.3:h:juniper:mx960:-:*:*:*:*:*:*:*", "matchCriteriaId": "B5E08E1E-0FE4-4294-9497-BBFFECA2A220", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;"}, {"lang": "es", "value": "Una comprobaci\u00f3n inapropiada de condiciones inusuales o excepcionales en el procesamiento de paquetes en el MS-MPC/MS-MIC usado por Juniper Networks Junos OS permite a un atacante malicioso enviar un paquete espec\u00edfico, haciendo que el MS-MPC/MS-MIC se reinicie, causando una Denegaci\u00f3n de Servicio (DoS). Si se sigue recibiendo y procesando este paquete, se crear\u00e1 una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS) sostenida. Este problema s\u00f3lo afecta a versiones espec\u00edficas de Juniper Networks Junos OS en la serie MX: 17.3R3-S11; 17.4R2-S13; 17.4R3 anterior a 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19. 4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; Este problema no afecta a ninguna versi\u00f3n de Juniper Networks Junos OS anterior a la 15.1X49-D240;"}], "id": "CVE-2021-31351", "lastModified": "2026-06-17T03:51:35.950", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}]}, "published": "2021-10-19T19:15:08.597", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11216"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11216"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-754"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-754"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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