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Public proof of conceptFix available

CVE-2024-23656

A public proof of concept exists; no exploitation attested.

  • Published2024-01-25
  • Fixed in2.38.0 · 0.0.0-20240125115555-5bbdb4420254
  • WeaknessCWE-326 · CWE-757

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2024-01-2520:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-23656?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-23656?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD
dexidp/dex
BranchAffectedFixed in
2.x≥ 2.37.0, < 2.38.02.38.0
0.0< 0.0.0-20240125115555-5bbdb44202540.0.0-20240125115555-5bbdb4420254
Linuxfoundation dex
BranchAffectedFixed in
2.37= 2.37.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update dexidp/dex to 2.38.0 · 0.0.0-20240125115555-5bbdb4420254

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionpoc2025-06-03
  • OpenCVESSVC decisionpoc—
  • CNACVSS 3.17.5read 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • CNAweakness (CWE)CWE-326, CWE-757read 2026-10-23
  • NVDweakness (CWE)CWE-326read 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2024-01-25
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2024-23656?

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.

Is CVE-2024-23656 actively exploited?

A proof-of-concept exploit exists for CVE-2024-23656, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2024-23656?

CVE-2024-23656 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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