CVE-2020-8843

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*", "matchCriteriaId": "A63CAC85-C108-4980-ABE3-6FED91D2ABA5", "versionEndIncluding": "1.3.6", "versionStartIncluding": "1.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Istio versiones 1.3 hasta 1.3.6. En determinadas circunstancias, es posible omitir una pol\u00edtica Mixer configurada espec\u00edficamente. Istio-proxy acepta el encabezado x-istio-attributes en la entrada que puede ser usado para afectar las decisiones de la pol\u00edtica cuando la pol\u00edtica Mixer se aplica selectivamente a una fuente igual a la entrada. Para explotar esta vulnerabilidad, alguien tiene que codificar un archivo source.uid en este encabezado. Esta funcionalidad est\u00e1 deshabilitada por defecto en Istio versiones 1.3 y 1.4."}], "id": "CVE-2020-8843", "lastModified": "2026-06-17T03:27:02.970", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-02-14T19:15:10.683", "references": [{"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": ["Vendor Advisory"], "url": "https://istio.io/news/security/istio-security-2020-002/"}, {"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": ["Vendor Advisory"], "url": "https://istio.io/news/security/istio-security-2020-002/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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