CVE-2024-23656

Name: CVE-2024-23656
Creator: NVD / NIST
Published: 2024-01-25T20:15:41.107+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2024-23656 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Dex is an identity service that uses OpenID Connect to drive authentication for other apps. Dex 2.37.0 serves HTTPS with insecure TLS 1.0 and TLS 1.1. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

Dex is an identity service that uses OpenID Connect to drive authentication for other apps. Dex 2.37.0 serves HTTPS with insecure TLS 1.0 and TLS 1.1. `cmd/dex/serve.go` line 425 seemingly sets TLS 1.2 as minimum version, but the whole `tlsConfig` is ignored after `TLS cert reloader` was introduced in v2.37.0. Configured cipher suites are not respected either. This issue is fixed in Dex 2.38.0.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.43%

34.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linuxfoundation	Dex	2.37.0

References

https://github.com/dexidp/dex/blob/70d7a2c7c1bb2646b1a540e49616cbc39622fb83/cmd/dex/serve.go#L425Product
https://github.com/dexidp/dex/commit/5bbdb4420254ba73b9c4df4775fe7bdacf233b17Patch
https://github.com/dexidp/dex/issues/2848Issue Tracking
https://github.com/dexidp/dex/pull/2964Issue Tracking, Patch
https://github.com/dexidp/dex/security/advisories/GHSA-gr79-9v6v-gc9rExploit
https://github.com/dexidp/dex/blob/70d7a2c7c1bb2646b1a540e49616cbc39622fb83/cmd/dex/serve.go#L425Product
https://github.com/dexidp/dex/commit/5bbdb4420254ba73b9c4df4775fe7bdacf233b17Patch
https://github.com/dexidp/dex/issues/2848Issue Tracking
https://github.com/dexidp/dex/pull/2964Issue Tracking, Patch
https://github.com/dexidp/dex/security/advisories/GHSA-gr79-9v6v-gc9rExploit

Timeline

Published: Jan 25, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-23656?

How severe is CVE-2024-23656?

CVE-2024-23656 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2024-23656?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-23656?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST