{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2020-16844","sourceIdentifier":"cve@mitre.org","published":"2020-10-01T17:15:13.150","lastModified":"2026-06-17T02:58:07.657","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g. *-some-suffix) for source principals or namespace fields, callers will never be denied access, bypassing the intended policy."},{"lang":"es","value":"En Istio versiones 1.5.0 hasta 1.5.8 e Istio versiones 1.6.0 hasta 1.6.7, cuando los usuarios especifican un recurso AuthorizationPolicy con acciones DENY usando sufijos de comodín (por ejemplo, *-some-suffix) para los campos source principals o namespace, a los que llaman nunca se le denegará el acceso, omitiendo la política prevista"}],"affected":[{"source":"cve@mitre.org","affectedData":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","baseScore":6.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":1.6,"impactScore":5.2}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:S/C:P/I:P/A:N","baseScore":4.9,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":6.8,"impactScore":4.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*","versionStartIncluding":"1.5.0","versionEndIncluding":"1.5.8","matchCriteriaId":"F442FD61-0BF6-40CF-A61F-17169F7164BB"},{"vulnerable":true,"criteria":"cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*","versionStartIncluding":"1.6.0","versionEndIncluding":"1.6.7","matchCriteriaId":"77283330-B057-436E-9F15-59933DFE38E2"}]}]}],"references":[{"url":"https://github.com/istio/istio/releases","source":"cve@mitre.org","tags":["Vendor Advisory"]},{"url":"https://istio.io/latest/news/security/istio-security-2020-009/","source":"cve@mitre.org","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/istio/istio/releases","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://istio.io/latest/news/security/istio-security-2020-009/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Mitigation","Vendor Advisory"]}]}}