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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*", "matchCriteriaId": "4525B2C8-CAF7-4A8D-8BF3-0109A860D07D", "versionEndIncluding": "1.3.7", "versionStartIncluding": "1.3", "vulnerable": true}, {"criteria": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*", "matchCriteriaId": "4620694C-DF2C-44BE-B3B7-43D0B4302AD4", "versionEndIncluding": "1.4.3", "versionStartIncluding": "1.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:redhat:openshift_service_mesh:1.0:*:*:*:*:*:*:*", "matchCriteriaId": "732F14CE-7994-4DD2-A28B-AE9E79826C01", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "descriptions": [{"lang": "en", "value": "Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example, an attacker can add a ? or # character to a URI that would otherwise satisfy an exact-path match."}, {"lang": "es", "value": "Las versiones Istio 1.2.10 (End of Life) y anteriores, 1.3 a 1.3.7, y 1.4 a 1.4.3 permiten la omisi\u00f3n de autenticaci\u00f3n. La l\u00f3gica de coincidencia de ruta exacta de la Pol\u00edtica de autenticaci\u00f3n puede permitir el acceso no autorizado a rutas HTTP incluso si est\u00e1n configuradas para acceder solo despu\u00e9s de presentar un token JWT v\u00e1lido. Por ejemplo, un atacante puede agregar un? o # car\u00e1cter a un URI que de otro modo satisfar\u00eda una coincidencia de ruta exacta."}], "id": "CVE-2020-8595", "lastModified": "2024-11-21T05:39:05.677", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-02-12T15:15:14.727", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2020:0477"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://access.redhat.com/security/cve/cve-2020-8595"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Mitigation", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "https://github.com/istio/istio/commits/master"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://istio.io/news/security/"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://istio.io/news/security/istio-security-2020-001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2020:0477"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://access.redhat.com/security/cve/cve-2020-8595"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Mitigation", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/istio/istio/commits/master"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://istio.io/news/security/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://istio.io/news/security/istio-security-2020-001/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank The Istio Product Security Committee for reporting this issue.", "affected_release": [{"advisory": "RHSA-2020:0477", "cpe": "cpe:/a:redhat:service_mesh:1.0::el8", "package": "servicemesh-proxy-0:1.0.7-1.el8", "product_name": "OpenShift Service Mesh 1.0", "release_date": "2020-02-12T00:00:00Z"}], "bugzilla": {"description": "istio: unauthorised access to JWT protected HTTP path", "id": "1798247", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1798247"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "status": "verified"}, "cwe": "CWE-285", "details": ["Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example, an attacker can add a ? or # character to a URI that would otherwise satisfy an exact-path match.", "An unauthorized access vulnerability was found in Istio in the servicemesh-proxy. An attacker can use this flaw to specify an HTTP path and gain unauthorized access, even if the path is configured to only be accessed with a valid JSON Web Token (JWT)."], "mitigation": {"lang": "en:us", "value": "Depending on the paths used in the exact match clause, it is possible to update the path to a regex. \nAs provided by the Istio Product Committee, the following mitigation can be employed.\nThe original policy specifying a JWT protected path is as follows:\n---\napiVersion: \"authentication.istio.io/v1alpha1\"\nkind: \"Policy\"\nmetadata:\nname: \"jwt-example\"\nnamespace: istio-system\nspec:\ntargets:\n- name: istio-ingressgateway\norigins:\n- jwt:\nissuer: \"testing@secure.istio.io\"\njwksUri: \"https://raw.githubusercontent.com/istio/istio/release-1.4/security/tools/jwt/samples/jwks.json\"\ntrigger_rules:\n- included_paths:\n- exact: /productpage\nThe exact path definition can then be updated to a regular expression:\n---\n- jwt:\nissuer: \"testing@secure.istio.io\"\njwksUri: \"https://raw.githubusercontent.com/istio/istio/release-1.4/security/tools/jwt/samples/jwks.json\"\ntrigger_rules:\n- included_paths:\n- regex: '/productpage(\\?.*)?'\n- regex: '/productpage(#.*)?'"}, "name": "CVE-2020-8595", "public_date": "2020-02-11T18:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-8595\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-8595\nhttps://istio.io/news/security/istio-security-2020-001/"], "threat_severity": "Important"}