CVE-2024-23656

Dex 2.37.0 is discarding TLSconfig and always serves deprecated TLS 1.0/1.1 and insecure ciphers

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Dex es un servicio de identidad que utiliza OpenID Connect para impulsar la autenticación de otras aplicaciones. Dex 2.37.0 sirve HTTPS con TLS 1.0 y TLS 1.1 inseguros. La línea 425 de `cmd/dex/serve.go` aparentemente establece TLS 1.2 como versión mínima, pero el `tlsConfig` completo se ignora después de que se introdujo el `TLS cert reloader` en v2.37.0. Tampoco se respetan los conjuntos de cifrado configurados. Este problema se solucionó en Dex 2.38.0.

*Credits: N/A

CVSS Scores

NISTv3.1 7.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2024-01-19 CVE Reserved
2024-01-25 CVE Published
2024-02-01 EPSS Updated
2024-08-01 CVE Updated
2024-08-01 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-326: Inadequate Encryption Strength
CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')

CAPEC

References (5)

URL	Tag	Source
https://github.com/dexidp/dex/blob/70d7a2c7c1bb2646b1a540e49616cbc39622fb83/cmd/dex/serve.go#L425	Product
https://github.com/dexidp/dex/issues/2848	Issue Tracking

URL	Date	SRC
https://github.com/dexidp/dex/security/advisories/GHSA-gr79-9v6v-gc9r	2024-08-01

URL	Date	SRC
https://github.com/dexidp/dex/commit/5bbdb4420254ba73b9c4df4775fe7bdacf233b17	2024-01-31
https://github.com/dexidp/dex/pull/2964	2024-01-31

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linuxfoundation Search vendor "Linuxfoundation"		Dex Search vendor "Linuxfoundation" for product "Dex"				2.37.0 Search vendor "Linuxfoundation" for product "Dex" and version "2.37.0"		-		Affected