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CVE-2024-24814: mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP serve

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This week
HIGH 7.5REMOTEWATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2024-24814 is a high-severity flaw (CVSS 7.5) affecting mod auth openidc, debian linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

  • High severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.2% (top 31%)
CISA exploited listNo
WeaknessCWE-400
Published2024-02-13
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: debian · fedoraproject · openidc

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

openidc mod auth openidc UPGRADE
Affected: >= 2.0.0 and <= 2.4.15.1
Fixed in: newer than 2.4.15.1
Safe to downgrade to: a release before 2.0.0
1. Check installed version
apt-cache policy mod-auth-openidc || rpm -q mod-auth-openidc || mod-auth-openidc --version
2. UPGRADE to newer than 2.4.15.1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade mod-auth-openidc
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade mod-auth-openidc
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)
apt-cache madison mod-auth-openidc sudo apt install mod-auth-openidc=<VERSION_BEFORE_2.0.0> sudo apt-mark hold mod-auth-openidc
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list mod-auth-openidc sudo dnf downgrade mod-auth-openidc-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add mod-auth-openidc
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
debian debian linux MITIGATE
Affected: 10.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 10.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
fedoraproject fedora MITIGATE
Affected: 39
Fixed in: no fixed release known
Safe to downgrade to: a release before 39
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-24814?

mod auth openidc: upgrade to newer than 2.4.15.1; debian linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-24814 being exploited?

CVE-2024-24814 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-24814 affect?

CVE-2024-24814 affects mod auth openidc, debian linux, fedora. Severity is high (CVSS 7.5). 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_openid

How urgent is CVE-2024-24814?

Priority 59/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

References

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