CVE-2017-11501: Nixos Project Nixos

Medium severity, CVSS 5.9. EPSS: 0.9% chance of exploitation in the next 30 days.

NixOS 17.03 and earlier has an unintended default absence of SSL Certificate Validation for LDAP. The users.ldap NixOS module implements user authentication against LDAP servers via a PAM module. It was found that if TLS is enabled to connect to the LDAP server with users.ldap.useTLS, peer verification will be unconditionally disabled in /etc/ldap.conf.

Affected products

• Nixos Project Nixos: up to and including 17.03

Published 2017-07-20. Last modified 2026-06-17.