CVE-2021-31355

{"containers": {"cna": {"affected": [{"product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "12.3X48-D105", "status": "affected", "version": "12.3X48", "versionType": "custom"}, {"lessThan": "15.1X49-D220", "status": "affected", "version": "15.1X49", "versionType": "custom"}, {"lessThan": "18.3R3-S5", "status": "affected", "version": "18.3", "versionType": "custom"}, {"lessThan": "18.4R3-S9", "status": "affected", "version": "18.4", "versionType": "custom"}, {"lessThan": "19.1R3-S7", "status": "affected", "version": "19.1", "versionType": "custom"}, {"lessThan": "19.2R3-S3", "status": "affected", "version": "19.2", "versionType": "custom"}, {"lessThan": "19.3R3-S4", "status": "affected", "version": "19.3", "versionType": "custom"}, {"lessThan": "19.4R3-S6", "status": "affected", "version": "19.4", "versionType": "custom"}, {"lessThan": "20.1R3", "status": "affected", "version": "20.1", "versionType": "custom"}, {"lessThan": "20.2R1-S1, 20.2R2", "status": "affected", "version": "20.2", "versionType": "custom"}, {"lessThan": "20.3R2", "status": "affected", "version": "20.3", "versionType": "custom"}, {"lessThan": "20.4R2", "status": "affected", "version": "20.4", "versionType": "custom"}, {"lessThan": "21.1R2", "status": "affected", "version": "21.1", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "A sample configuration for Captive Portal is shown below:\n\n [system services web-management http ]\n [set system services web-management https]\n [services captive-portal secure-authentication https]"}], "credits": [{"lang": "en", "value": "Juniper SIRT would like to acknowledge and thank Fans0n Fan for responsibly reporting this vulnerability."}], "datePublic": "2021-10-13T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A persistent cross-site scripting (XSS) vulnerability in the captive portal graphical user interface of Juniper Networks Junos OS may allow a remote authenticated user to inject web script or HTML and steal sensitive data and credentials from a web administration session, possibly tricking a follow-on administrative user to perform administrative actions on the device. This issue affects Juniper Networks Junos OS: All versions, including the following supported releases: 12.3X48 versions prior to 12.3X48-D105; 15.1X49 versions prior to 15.1X49-D220; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R1-S1, 20.2R2; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2; 21.1 versions prior to 21.1R2."}], "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": 8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Cross-site Scripting (XSS)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-10-19T18:16:37.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA11220"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: Junos OS 12.3X48-D105, 15.1X49-D220, 18.3R3-S5, 18.4R3-S9, 19.1R3-S7, 19.2R3-S3, 19.3R3-S4, 19.4R3-S6, 20.1R3, 20.2R1-S1, 20.2R2, 20.3R2, 20.4R2, 21.1R2, 21.2R1 and all subsequent releases.\n\nAdditionally, after performing an upgrade to a resolved release, additional steps must be taken to ensure that all stored malicious scripts are removed from the configuration."}], "source": {"advisory": "JSA11220", "defect": ["1449280"], "discovery": "EXTERNAL"}, "title": "Junos OS: Stored Cross-Site Scripting (XSS) vulnerability in captive portal", "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-2021-31355", "STATE": "PUBLIC", "TITLE": "Junos OS: Stored Cross-Site Scripting (XSS) vulnerability in captive portal"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"version_affected": "<", "version_name": "12.3X48", "version_value": "12.3X48-D105"}, {"version_affected": "<", "version_name": "15.1X49", "version_value": "15.1X49-D220"}, {"version_affected": "<", "version_name": "18.3", "version_value": "18.3R3-S5"}, {"version_affected": "<", "version_name": "18.4", "version_value": "18.4R3-S9"}, {"version_affected": "<", "version_name": "19.1", "version_value": "19.1R3-S7"}, {"version_affected": "<", "version_name": "19.2", "version_value": "19.2R3-S3"}, {"version_affected": "<", "version_name": "19.3", "version_value": "19.3R3-S4"}, {"version_affected": "<", "version_name": "19.4", "version_value": "19.4R3-S6"}, {"version_affected": "<", "version_name": "20.1", "version_value": "20.1R3"}, {"version_affected": "<", "version_name": "20.2", "version_value": "20.2R1-S1, 20.2R2"}, {"version_affected": "<", "version_name": "20.3", "version_value": "20.3R2"}, {"version_affected": "<", "version_name": "20.4", "version_value": "20.4R2"}, {"version_affected": "<", "version_name": "21.1", "version_value": "21.1R2"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "configuration": [{"lang": "en", "value": "A sample configuration for Captive Portal is shown below:\n\n [system services web-management http ]\n [set system services web-management https]\n [services captive-portal secure-authentication https]"}], "credit": [{"lang": "eng", "value": "Juniper SIRT would like to acknowledge and thank Fans0n Fan for responsibly reporting this vulnerability."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A persistent cross-site scripting (XSS) vulnerability in the captive portal graphical user interface of Juniper Networks Junos OS may allow a remote authenticated user to inject web script or HTML and steal sensitive data and credentials from a web administration session, possibly tricking a follow-on administrative user to perform administrative actions on the device. This issue affects Juniper Networks Junos OS: All versions, including the following supported releases: 12.3X48 versions prior to 12.3X48-D105; 15.1X49 versions prior to 15.1X49-D220; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R1-S1, 20.2R2; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2; 21.1 versions prior to 21.1R2."}]}, "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": 8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Cross-site Scripting (XSS)"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA11220", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA11220"}]}, "solution": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: Junos OS 12.3X48-D105, 15.1X49-D220, 18.3R3-S5, 18.4R3-S9, 19.1R3-S7, 19.2R3-S3, 19.3R3-S4, 19.4R3-S6, 20.1R3, 20.2R1-S1, 20.2R2, 20.3R2, 20.4R2, 21.1R2, 21.2R1 and all subsequent releases.\n\nAdditionally, after performing an upgrade to a resolved release, additional steps must be taken to ensure that all stored malicious scripts are removed from the configuration."}], "source": {"advisory": "JSA11220", "defect": ["1449280"], "discovery": "EXTERNAL"}, "work_around": [{"lang": "en", "value": "There are no viable workarounds for this issue."}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T22:55:53.586Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://kb.juniper.net/JSA11220"}]}]}, "cveMetadata": {"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "assignerShortName": "juniper", "cveId": "CVE-2021-31355", "datePublished": "2021-10-19T18:16:38.035Z", "dateReserved": "2021-04-15T00:00:00.000Z", "dateUpdated": "2024-09-17T00:42:23.357Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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This issue affects Juniper Networks Junos OS: All versions, including the following supported releases: 12.3X48 versions prior to 12.3X48-D105; 15.1X49 versions prior to 15.1X49-D220; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R1-S1, 20.2R2; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2; 21.1 versions prior to 21.1R2."}, {"lang": "es", "value": "Una vulnerabilidad de tipo cross-site scripting (XSS) persistente en la interfaz gr\u00e1fica de usuario del portal cautivo de Juniper Networks Junos OS puede permitir que un usuario remoto autenticado inyecte script web o HTML y robe datos y credenciales confidenciales de una sesi\u00f3n de administraci\u00f3n web, posiblemente enga\u00f1ando a un usuario administrativo posterior para que lleve a cabo acciones administrativas en el dispositivo. Este problema afecta a Juniper Networks Junos OS: Todas las versiones, incluidas las siguientes versiones compatibles: versiones 12.3X48 anteriores a 12.3X48-D105; versiones 15.1X49 anteriores a 15.1X49-D220; versiones 18.3 anteriores a 18.3R3-S5; versiones 18.4 anteriores a 18.4R3-S9; versiones 19.1 anteriores a 19.1R3-S7; versiones 19.2 anteriores a 19.2R3-S3; versiones 19. 3 versiones anteriores a 19.3R3-S4; versiones 19.4 anteriores a 19.4R3-S6; versiones 20.1 anteriores a 20.1R3; versiones 20.2 anteriores a 20.2R1-S1, 20.2R2; versiones 20.3 anteriores a 20.3R2; versiones 20.4 anteriores a 20.4R2; versiones 21.1 anteriores a 21.1R2"}], "id": "CVE-2021-31355", "lastModified": "2026-06-17T03:51:36.613", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 5.9, "source": "sirt@juniper.net", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-19T19:15:08.837", "references": [{"source": "sirt@juniper.net", "tags": ["Patch", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA11220"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA11220"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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