CVE-2021-43557

{"id": "CVE-2021-43557", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2021-11-22T09:15:07.627", "references": [{"url": "http://www.openwall.com/lists/oss-security/2021/11/22/1", "tags": ["Mailing List", "Third Party Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/11/22/2", "tags": ["Mailing List", "Third Party Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/11/23/1", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "source": "security@apache.org"}, {"url": "https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h", "tags": ["Exploit", "Mailing List", "Vendor Advisory"], "source": "security@apache.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-77"}]}], "descriptions": [{"lang": "en", "value": "The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification. The $request_uri is the full original request URI without normalization. This makes it possible to construct a URI to bypass the block list on some occasions. For instance, when the block list contains \"^/internal/\", a URI like `//internal/` can be used to bypass it. Some other plugins also have the same issue. And it may affect the developer's custom plugin."}, {"lang": "es", "value": "El plugin uri-block en Apache APISIX versiones anteriores a 2.10.2, usa $request_uri sin verificaci\u00f3n. La $request_uri es la URI original completa de la petici\u00f3n sin normalizar. Esto hace posible construir un URI para evitar la lista de bloqueo en algunas ocasiones. Por ejemplo, cuando la lista de bloqueo contiene \"^/internal/\", puede usarse una URI como \"//internal/\" para omitirla. Algunos otros plugins tambi\u00e9n presentan el mismo problema. Y puede afectar al plugin personalizado del desarrollador"}], "lastModified": "2021-11-26T15:47:02.063", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E6E300E2-7036-4813-B7A7-48F922753C76", "versionEndExcluding": "2.10.2"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}