CVE-2024-24814 Denial of service when manipulating mod_auth_openidc_session_chunks cookie in mod_auth_openidc
Attackers can cause denial of service by sending crafted cookies with large integer values to the mod_auth_openidc module.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-24814?
CVE-2024-24814 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 13 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-400
Which versions are affected by CVE-2024-24814?
It affects 3 products.
Linux distribution packages (39)
cjose AlmaLinux:8 | All versions | 0.6.1-4.module_el8.10.0+3881+234adf82 |
cjose AlmaLinux:8 | All versions | 0.6.1-4.module_el8.9.0+3631+0ced13d7 |
cjose-devel AlmaLinux:8 | All versions | 0.6.1-4.module_el8.10.0+3881+234adf82 |
cjose-devel AlmaLinux:8 | All versions | 0.6.1-4.module_el8.9.0+3631+0ced13d7 |
mod_auth_openidc AlmaLinux:8 | All versions | 2.4.9.4-6.module_el8.10.0+3881+234adf82 |
mod_auth_openidc AlmaLinux:9 | All versions | 2.4.10-1.el9 |
cjose Red Hat:enterprise_linux:8::appstream | All versions | 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 |
cjose-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 |
cjose-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 |
cjose-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 |
mod_auth_openidc Red Hat:enterprise_linux:8::appstream | All versions | 0:2.4.9.4-6.module+el8.10.0+21813+b5444eb8 |
mod_auth_openidc-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.4.9.4-6.module+el8.10.0+21813+b5444eb8 |
mod_auth_openidc-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:2.4.9.4-6.module+el8.10.0+21813+b5444eb8 |
mod_auth_openidc Red Hat:enterprise_linux:9::appstream | All versions | 0:2.4.10-1.el9 |
mod_auth_openidc-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:2.4.10-1.el9 |
mod_auth_openidc-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:2.4.10-1.el9 |
cjose Rocky Linux:8 | All versions | 0:0.6.1-4.module+el8.9.0+1384+4b58c166 |
mod_auth_openidc Rocky Linux:8 | All versions | 0:2.4.9.4-6.module+el8.10.0+1846+b7dcd2c3 |
mod_auth_openidc Rocky Linux:9 | All versions | 0:2.4.10-1.el9 |
apache2-mod_auth_openidc SUSE:Enterprise Storage 7.1 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Module for Server Applications 15 SP5 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Module for Server Applications 15 SP6 | All versions | 2.3.8-150600.16.5.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server 12 SP5 | All versions | 2.4.0-7.12.2 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 2.4.0-7.12.2 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Manager Proxy 4.3 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc SUSE:Manager Server 4.3 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc openSUSE:Leap 15.5 | All versions | 2.3.8-150100.3.28.1 |
apache2-mod_auth_openidc openSUSE:Leap 15.6 | All versions | 2.3.8-150600.16.5.1 |
apache2-mod_auth_openidc openSUSE:Tumbleweed | All versions | 2.4.15.3-1.1 |
Products include Debian Debian Linux, Fedoraproject Fedora, Openidc Mod Auth Openidc.
How do I fix CVE-2024-24814?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-24814 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-24814 exists.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALSA-2024:5289, ALSA-2024:9180, AZL-42520, AZL-42537, CLSA-2025-1746655009, DEBIAN-CVE-2024-24814 and 16 more.