CVE-2024-23656CWE-326CWE-757

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

High · published January 25, 2024

CVSS v3.1
7.5
EPSS
0%
Percentile
36.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00435 · 36.7th percentile
Weaknesses
CWE-326 · Inadequate Encryption Strength; CWE-757 · Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
Published
2024-01-25T19:45Z
EPSS history
Timeline
  • 25 JAN 19:45Z
    Dex 2.37.0 is discarding TLSconfig and always serves deprecated TLS 1.0/1.1 and insecure ciphers
    cvelistv5