CVE-2021-32786

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{}

{"affected": [{"affectedData": [{"product": "mod_auth_openidc", "vendor": "zmartzone", "versions": [{"status": "affected", "version": "< 2.4.9"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*", "matchCriteriaId": "FAEFDBA2-55AD-410B-95C4-D2524C65B4A8", "versionEndExcluding": "2.4.9", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "BC9C65B5-0989-4D64-9BED-1E391AD971AE", "versionEndIncluding": "2.4.48", "versionStartIncluding": "2.0.0", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect with slashes to address a particular breaking change between the different specifications (RFC2396 / RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression."}, {"lang": "es", "value": "mod_auth_openidc es un m\u00f3dulo de autenticaci\u00f3n/autorizaci\u00f3n para el servidor HTTP Apache versi\u00f3n 2.x que funciona como un OpenID Connect Relying Party, autenticando a usuarios contra un OpenID Connect Provider. En versiones anteriores a 2.4.9, \"oidc_validate_redirect_url()\" no analiza las URLs de la misma manera que la mayor\u00eda de los navegadores. Como resultado, esta funci\u00f3n puede ser omitida y conlleva a una vulnerabilidad de Redirecci\u00f3n Abierta en la funcionalidad logout. Este bug ha sido corregido en versi\u00f3n 2.4.9 al reemplazar cualquier barra invertida de la URL a redirigir por barras inclinadas para solucionar un cambio particular de ruptura entre las diferentes especificaciones (RFC2396 / RFC3986 y WHATWG). Como soluci\u00f3n, esta vulnerabilidad puede ser mitigada configurando \"mod_auth_openidc\" para que s\u00f3lo permita la redirecci\u00f3n cuyo destino coincida con una expresi\u00f3n regular determinada"}], "id": "CVE-2021-32786", "lastModified": "2026-06-17T03:53:37.627", "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": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-22T22:15:08.233", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://daniel.haxx.se/blog/2017/01/30/one-url-standard-please/"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/zmartzone/mod_auth_openidc/commit/3a115484eb927bc6daa5737dd84f88ff4bbc5544"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-xm4c-5wm5-jqv7"}, {"source": "security-advisories@github.com", "url": "https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html"}, {"source": "security-advisories@github.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZVF6BSJLRQZ7PFFR4X5JSU6KUJYNOCU/"}, {"source": "security-advisories@github.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QXAWKPT5LXZSUTFSJ6IWSZC7RMYYQXQD/"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210902-0001/"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://daniel.haxx.se/blog/2017/01/30/one-url-standard-please/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/zmartzone/mod_auth_openidc/commit/3a115484eb927bc6daa5737dd84f88ff4bbc5544"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-xm4c-5wm5-jqv7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZVF6BSJLRQZ7PFFR4X5JSU6KUJYNOCU/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QXAWKPT5LXZSUTFSJ6IWSZC7RMYYQXQD/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210902-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-601"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2022:1823", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "mod_auth_openidc:2.3-8060020220131105504.d63f516d", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-05-10T00:00:00Z"}], "bugzilla": {"description": "mod_auth_openidc: open redirect in oidc_validate_redirect_url()", "id": "1986102", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1986102"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-601", "details": ["mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect with slashes to address a particular breaking change between the different specifications (RFC2396 / RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression.", "A flaw was found in mod_auth_openidc where it does not sanitize redirection URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity."], "name": "CVE-2021-32786", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "mod_auth_openidc", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "mod_auth_openidc", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-07-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-32786\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-32786\nhttps://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-xm4c-5wm5-jqv7"], "threat_severity": "Moderate"}

{}