CVE-2024-24814

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In affected versions missing input validation on mod_auth_openidc_session_chunks cookie value makes the server vulnerable to a denial of service (DoS) attack. An internal security audit has been conducted and the reviewers found that if they manipulated the value of the mod_auth_openidc_session_chunks cookie to a very large integer, like 99999999, the server struggles with the request for a long time and finally gets back with a 500 error. Making a few requests of this kind caused our server to become unresponsive. Attackers can craft requests that would make the server work very hard (and possibly become unresponsive) and/or crash with minimal effort. This issue has been addressed in version 2.4.15.2. Users are advised to upgrade. There are no known workarounds for this vulnerability."}, {"lang": "es", "value": "mod_auth_openidc es un m\u00f3dulo de autorizaci\u00f3n y autenticaci\u00f3n OpenID Certified\u2122 para el servidor HTTP Apache 2.x que implementa la funcionalidad OpenID Connect Relying Party. En las versiones afectadas, la falta de validaci\u00f3n de entrada en el valor de la cookie mod_auth_openidc_session_chunks hace que el servidor sea vulnerable a un ataque de denegaci\u00f3n de servicio (DoS). Se realiz\u00f3 una auditor\u00eda de seguridad interna y los revisores descubrieron que si manipulaban el valor de la cookie mod_auth_openidc_session_chunks a un n\u00famero entero muy grande, como 99999999, el servidor lucha con la solicitud durante mucho tiempo y finalmente regresa con un error 500. Realizar algunas solicitudes de este tipo provoc\u00f3 que nuestro servidor dejara de responder. Los atacantes pueden crear solicitudes que har\u00edan que el servidor trabaje muy duro (y posiblemente deje de responder) y/o colapse con un m\u00ednimo esfuerzo. Este problema se solucion\u00f3 en la versi\u00f3n 2.4.15.2. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad."}], "id": "CVE-2024-24814", "lastModified": "2026-06-17T07:14:56.423", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-24814", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-04-10T18:58:12.898280Z", "version": "2.0.3"}}]}, "published": "2024-02-13T19:15:11.153", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/OpenIDC/mod_auth_openidc/commit/4022c12f314bd89d127d1be008b1a80a08e1203d"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-hxr6-w4gc-7vvv"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00004.html"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T7DKVEVREYAI4F46CQAVOTPL75WLOZOE/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/OpenIDC/mod_auth_openidc/commit/4022c12f314bd89d127d1be008b1a80a08e1203d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-hxr6-w4gc-7vvv"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00004.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T7DKVEVREYAI4F46CQAVOTPL75WLOZOE/"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:5289", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "mod_auth_openidc:2.3-8100020240516071625.489197e6", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-13T00:00:00Z"}, {"advisory": "RHSA-2024:9180", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "mod_auth_openidc-0:2.4.10-1.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "mod_auth_openidc: DoS when using `OIDCSessionType client-cookie` and manipulating cookies", "id": "2264092", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2264092"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["mod_auth_openidc is an OpenID Certified\u2122 authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. In affected versions missing input validation on mod_auth_openidc_session_chunks cookie value makes the server vulnerable to a denial of service (DoS) attack. An internal security audit has been conducted and the reviewers found that if they manipulated the value of the mod_auth_openidc_session_chunks cookie to a very large integer, like 99999999, the server struggles with the request for a long time and finally gets back with a 500 error. Making a few requests of this kind caused our server to become unresponsive. Attackers can craft requests that would make the server work very hard (and possibly become unresponsive) and/or crash with minimal effort. This issue has been addressed in version 2.4.15.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.", "A flaw was found in mod_auth_openidc, an OpenID Certified\u2122 authentication and authorization module for the Apache HTTP server. Missing input validation in the mod_auth_openidc_session_chunks cookie value can make the server vulnerable to a denial of service attack. This issue may allow a remote attacker to craft a request that causes the application or system to slow down or crash due to unhandled errors."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-24814", "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"}], "public_date": "2024-02-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-24814\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-24814"], "statement": "The identified vulnerability in the application's handling of the mod_auth_openidc_session_chunks cookie represents a moderate severity issue rather than a important one due to several factors. While the ability for attackers to craft requests causing server strain and potential unresponsiveness poses a threat to the availability of the service, it requires specific conditions to exploit. The attack relies on manipulating a specific cookie with an exceptionally large value, which may not be easily achievable without user interaction or prior access to the system. Additionally, the impact is limited to denial of service rather than compromising sensitive data or system integrity.", "threat_severity": "Moderate"}

{}