CVE-2017-11501

5.9 mediumEPSS 0.9%

Medium (5.9) in nixos project nixos. 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.

Severity

CVSS 3.0

5.9 medium

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
CWE: CWE-295
Published: 2017-07-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

nixos_project:nixos

References

http://openwall.com/lists/oss-security/2017/07/20/1
https://github.com/NixOS/nixpkgs/issues/27506
https://groups.google.com/forum/#%21topic/nix-security-announce/qrDU0KH_ZRk
http://openwall.com/lists/oss-security/2017/07/20/1
https://github.com/NixOS/nixpkgs/issues/27506

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