{"id":"UBUNTU-CVE-2024-24814","details":"mod_auth_openidc is an OpenID Certified™ 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.","modified":"2025-10-24T05:06:55Z","published":"2024-02-13T19:15:00Z","upstream":["CVE-2024-24814"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-24814"},{"type":"REPORT","url":"https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-hxr6-w4gc-7vvv"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-24814"}],"affected":[{"package":{"name":"libapache2-mod-auth-openidc","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.3.3-1build1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.6-1","2.3.1-2","2.3.2-1","2.3.2-1build1","2.3.3-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libapache2-mod-auth-openidc","binary_version":"2.3.3-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-24814.json"}},{"package":{"name":"libapache2-mod-auth-openidc","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.4.1-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.10.2-1","2.4.0.4-1","2.4.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libapache2-mod-auth-openidc","binary_version":"2.4.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-24814.json"}},{"package":{"name":"libapache2-mod-auth-openidc","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.4.11-1ubuntu0.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.9-1","2.4.9.4-1","2.4.10-1","2.4.10-1build1","2.4.11-1","2.4.11-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.11-1ubuntu0.1","binary_name":"libapache2-mod-auth-openidc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-24814.json"}},{"package":{"name":"libapache2-mod-auth-openidc","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.4.15.1-1ubuntu0.1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.14.2-1","2.4.14.4-2","2.4.14.4-2build1","2.4.15.1-1","2.4.15.1-1build2","2.4.15.1-1build3","2.4.15.1-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libapache2-mod-auth-openidc","binary_version":"2.4.15.1-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-24814.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}