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CVE-2024-24814

23
FAUCET Score

CVE-2024-24814 is a denial-of-service (DoS) vulnerability affecting mod_auth_openidc, an OpenID Connect module for Apache 2.x HTTP servers, and related Debian and Fedora distributions. The vulnerability stems from missing input validation on the mod_auth_openidc_session_chunks cookie value, allowing attackers to manipulate it with a large integer. This vulnerability has a CVSS score of 7.5 (High), indicating a critical impact on availability. It can be exploited remotely with low attack complexity, requiring no privileges or user interaction, and can render the server unresponsive or crash it. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. The vulnerability has received minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, <= 2.4.15.1CPE matchmatch criteria
cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
39CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.26%
Probability of exploitation in next 30 days
EPSS Percentile
66.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0126 is in the 46th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: mod_auth_openidc:2.3-8100020240516071625.489197e6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: mod_auth_openidc-0:2.4.10-1.el9
View patch

Vendor Advisories (1)

redhatCVE-2024-24814Moderate

mod_auth_openidc: DoS when using `OIDCSessionType client-cookie` and manipulating cookies

Feb 13, 2024

References

github.com / OpenIDC/mod_auth_openidc/commit/4022c12f314bd89d127d1be008b1a80a08e1203d
Patch
github.com / OpenIDC/mod_auth_openidc/security/advisories/GHSA-hxr6-w4gc-7vvv
ExploitVendor Advisory
lists.debian.org / debian-lts-announce/2024/03/msg00004.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/T7DKVEVREYAI4F46CQAVOTPL75WLOZOE
Mailing ListThird Party Advisory