CVE-2017-11501

Name: CVE-2017-11501
Creator: NVD / NIST
Published: 2017-07-20T23:29:00.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.88%

Last modified Jun 17, 2026

CVE-2017-11501 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.88% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

0.88%

54.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Nixos Project	Nixos	<= 17.03

References

http://openwall.com/lists/oss-security/2017/07/20/1Mailing List, Mitigation, Patch, Third Party Advisory
https://github.com/NixOS/nixpkgs/issues/27506Issue Tracking, Third Party Advisory
https://groups.google.com/forum/#%21topic/nix-security-announce/qrDU0KH_ZRk
http://openwall.com/lists/oss-security/2017/07/20/1Mailing List, Mitigation, Patch, Third Party Advisory
https://github.com/NixOS/nixpkgs/issues/27506Issue Tracking, Third Party Advisory
https://groups.google.com/forum/#%21topic/nix-security-announce/qrDU0KH_ZRk

Timeline

Published: Jul 20, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-11501?

How severe is CVE-2017-11501?

Severity scoring for CVE-2017-11501 is pending analysis. The EPSS model estimates a 0.88% probability of exploitation in the next 30 days.

How do I fix CVE-2017-11501?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-11501?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST