CVE-2021-3055

{"containers": {"cna": {"affected": [{"product": "PAN-OS", "vendor": "Palo Alto Networks", "versions": [{"status": "unaffected", "version": "10.1.*"}, {"changes": [{"at": "9.0.14", "status": "unaffected"}], "lessThan": "9.0.14", "status": "affected", "version": "9.0", "versionType": "custom"}, {"changes": [{"at": "9.1.10", "status": "unaffected"}], "lessThan": "9.1.10", "status": "affected", "version": "9.1", "versionType": "custom"}, {"changes": [{"at": "10.0.6", "status": "unaffected"}], "lessThan": "10.0.6", "status": "affected", "version": "10.0", "versionType": "custom"}, {"changes": [{"at": "8.1.20", "status": "unaffected"}], "lessThan": "8.1.20", "status": "affected", "version": "8.1", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "This issue was found by a customer of Palo Alto Networks during a security review."}], "datePublic": "2021-09-08T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access."}], "exploits": [{"lang": "en", "value": "Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-611", "description": "CWE-611 Improper Restriction of XML External Entity Reference ('XXE')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-09-08T17:10:22.000Z", "orgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0", "shortName": "palo_alto"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://security.paloaltonetworks.com/CVE-2021-3055"}], "solutions": [{"lang": "en", "value": "This issue is fixed in PAN-OS 8.1.20, PAN-OS 9.0.14, PAN-OS 9.1.10, PAN-OS 10.0.6, and all later PAN-OS versions."}], "source": {"defect": ["PAN-166241"], "discovery": "EXTERNAL"}, "timeline": [{"lang": "en", "time": "2021-09-08T00:00:00.000Z", "value": "Initial publication"}], "title": "PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface", "workarounds": [{"lang": "en", "value": "This issue requires the attacker to have authenticated access to the PAN-OS web interface. You can mitigate the impact of this issue by following best practices for securing the PAN-OS web interface. Please review the Best Practices for Securing Administrative Access in the PAN-OS technical documentation at https://docs.paloaltonetworks.com/best-practices."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "psirt@paloaltonetworks.com", "DATE_PUBLIC": "2021-09-08T16:00:00.000Z", "ID": "CVE-2021-3055", "STATE": "PUBLIC", "TITLE": "PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "PAN-OS", "version": {"version_data": [{"version_affected": "<", "version_name": "9.0", "version_value": "9.0.14"}, {"version_affected": "<", "version_name": "9.1", "version_value": "9.1.10"}, {"version_affected": "<", "version_name": "10.0", "version_value": "10.0.6"}, {"version_affected": "<", "version_name": "8.1", "version_value": "8.1.20"}, {"version_affected": "!>=", "version_name": "9.0", "version_value": "9.0.14"}, {"version_affected": "!>=", "version_name": "9.1", "version_value": "9.1.10"}, {"version_affected": "!>=", "version_name": "10.0", "version_value": "10.0.6"}, {"version_affected": "!>=", "version_name": "8.1", "version_value": "8.1.20"}, {"version_affected": "!", "version_name": "10.1", "version_value": "10.1.*"}]}}]}, "vendor_name": "Palo Alto Networks"}]}}, "credit": [{"lang": "eng", "value": "This issue was found by a customer of Palo Alto Networks during a security review."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access."}]}, "exploit": [{"lang": "en", "value": "Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability."}], "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-611 Improper Restriction of XML External Entity Reference ('XXE')"}]}]}, "references": {"reference_data": [{"name": "https://security.paloaltonetworks.com/CVE-2021-3055", "refsource": "MISC", "url": "https://security.paloaltonetworks.com/CVE-2021-3055"}]}, "solution": [{"lang": "en", "value": "This issue is fixed in PAN-OS 8.1.20, PAN-OS 9.0.14, PAN-OS 9.1.10, PAN-OS 10.0.6, and all later PAN-OS versions."}], "source": {"defect": ["PAN-166241"], "discovery": "EXTERNAL"}, "timeline": [{"lang": "en", "time": "2021-09-08T00:00:00.000Z", "value": "Initial publication"}], "work_around": [{"lang": "en", "value": "This issue requires the attacker to have authenticated access to the PAN-OS web interface. 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{"affected": [{"affectedData": [{"product": "PAN-OS", "vendor": "Palo Alto Networks", "versions": [{"status": "unaffected", "version": "10.1.*"}, {"changes": [{"at": "9.0.14", "status": "unaffected"}], "lessThan": "9.0.14", "status": "affected", "version": "9.0", "versionType": "custom"}, {"changes": [{"at": "9.1.10", "status": "unaffected"}], "lessThan": "9.1.10", "status": "affected", "version": "9.1", "versionType": "custom"}, {"changes": [{"at": "10.0.6", "status": "unaffected"}], "lessThan": "10.0.6", "status": "affected", "version": "10.0", "versionType": "custom"}, {"changes": [{"at": "8.1.20", "status": "unaffected"}], "lessThan": "8.1.20", "status": "affected", "version": "8.1", "versionType": "custom"}]}], "source": "psirt@paloaltonetworks.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*", "matchCriteriaId": "97BB12BB-096E-4CCD-B5F4-55900801DF74", "versionEndExcluding": "8.1.20", "versionStartIncluding": "8.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*", "matchCriteriaId": "E9EE274A-3AF1-4204-B43D-1EA54C6442CC", "versionEndExcluding": "9.0.14", "versionStartIncluding": "9.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*", "matchCriteriaId": "6EED4206-00CC-449A-9681-612EC258CCEF", "versionEndExcluding": "9.1.10", "versionStartIncluding": "9.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*", "matchCriteriaId": "F1E99AF9-C4D4-4F8F-8FE3-2580F47B97C7", "versionEndExcluding": "10.0.6", "versionStartIncluding": "10.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access."}, {"lang": "es", "value": "Una vulnerabilidad de restricci\u00f3n inapropiada de tipo XML external entity (XXE) en la interfaz web de Palo Alto Networks PAN-OS permite a un administrador autenticado leer cualquier archivo arbitrario del sistema de archivos y enviar una petici\u00f3n espec\u00edficamente dise\u00f1ada al firewall que cause el bloqueo del servicio. Los intentos repetidos de enviar esta petici\u00f3n resultar\u00e1n en una denegaci\u00f3n de servicio de todos los servicios de PAN-OS, al reiniciar el dispositivo y poni\u00e9ndolo en modo de mantenimiento. Este problema afecta a: PAN-OS versi\u00f3n 8.1 anteriores a PAN-OS 8.1.20; PAN-OS versi\u00f3n 9.0 anteriores a PAN-OS 9.0.14; PAN-OS versi\u00f3n 9.1 anteriores a PAN-OS 9.1.10; PAN-OS versi\u00f3n 10.0 anteriores a PAN-OS 10.0.6. Este problema no afecta a Prisma Access"}], "id": "CVE-2021-3055", "lastModified": "2026-06-17T04:04:38.870", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 7.8, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.2, "source": "psirt@paloaltonetworks.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-09-08T17:15:12.337", "references": [{"source": "psirt@paloaltonetworks.com", "tags": ["Vendor Advisory"], "url": "https://security.paloaltonetworks.com/CVE-2021-3055"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://security.paloaltonetworks.com/CVE-2021-3055"}], "sourceIdentifier": "psirt@paloaltonetworks.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-611"}], "source": "psirt@paloaltonetworks.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-611"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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