CVE-2021-44878

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "If an OpenID Connect provider supports the \"none\" algorithm (i.e., tokens with no signature), pac4j v5.3.0 (and prior) does not refuse it without an explicit configuration on its side or for the \"idtoken\" response type which is not secure and violates the OpenID Core Specification. The \"none\" algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using \"none\" as the value of \"alg\" key in the header with an empty signature value."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2022-03-30T01:57:49.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae"}, {"tags": ["x_refsource_MISC"], "url": "https://openid.net/specs/openid-connect-core-1_0.html#IDToken"}, {"tags": ["x_refsource_MISC"], "url": "https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-44878", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "If an OpenID Connect provider supports the \"none\" algorithm (i.e., tokens with no signature), pac4j v5.3.0 (and prior) does not refuse it without an explicit configuration on its side or for the \"idtoken\" response type which is not secure and violates the OpenID Core Specification. The \"none\" algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using \"none\" as the value of \"alg\" key in the header with an empty signature value."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae", "refsource": "MISC", "url": "https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae"}, {"name": "https://openid.net/specs/openid-connect-core-1_0.html#IDToken", "refsource": "MISC", "url": "https://openid.net/specs/openid-connect-core-1_0.html#IDToken"}, {"name": "https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html", "refsource": "MISC", "url": "https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:32:13.070Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://openid.net/specs/openid-connect-core-1_0.html#IDToken"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-44878", "datePublished": "2022-01-06T12:52:04.000Z", "dateReserved": "2021-12-13T00:00:00.000Z", "dateUpdated": "2024-08-04T04:32:13.070Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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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:pac4j:pac4j:*:*:*:*:*:*:*:*", "matchCriteriaId": "2C74CE58-A3A8-44B5-83EA-611E214FD060", "versionEndExcluding": "4.5.5", "vulnerable": true}, {"criteria": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*", "matchCriteriaId": "949A0839-AB1F-4806-B5F9-8317835EB0E2", "versionEndExcluding": "5.3.1", "versionStartIncluding": "5.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "If an OpenID Connect provider supports the \"none\" algorithm (i.e., tokens with no signature), pac4j v5.3.0 (and prior) does not refuse it without an explicit configuration on its side or for the \"idtoken\" response type which is not secure and violates the OpenID Core Specification. The \"none\" algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using \"none\" as the value of \"alg\" key in the header with an empty signature value."}, {"lang": "es", "value": "Si un proveedor de OpenID Connect soporta el algoritmo \"none\" (es decir, tokens sin firma), pac4j v5.3.0 (y anteriores) no lo rechaza sin una configuraci\u00f3n expl\u00edcita por su parte o para el tipo de respuesta \"idtoken\", que no es seguro y viola la especificaci\u00f3n OpenID Core. El algoritmo \"none\" no requiere ninguna verificaci\u00f3n de firma al validar los tokens de identificaci\u00f3n, lo que permite al atacante saltarse la validaci\u00f3n de tokens inyectando un token de identificaci\u00f3n malformado utilizando \"none\" como valor de la clave \"alg\" en la cabecera con un valor de firma vac\u00edo"}], "id": "CVE-2021-44878", "lastModified": "2026-06-17T04:12:55.477", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-01-06T13:15:08.180", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae"}, {"source": "cve@mitre.org", "tags": ["Product", "Third Party Advisory"], "url": "https://openid.net/specs/openid-connect-core-1_0.html#IDToken"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product", "Third Party Advisory"], "url": "https://openid.net/specs/openid-connect-core-1_0.html#IDToken"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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