{"id":"CVE-2017-11501","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-11501","generatedAt":"2026-10-29T02:45:08.901Z","title":"NixOS 17.03 and earlier has an unintended default absence of SSL Certificate Validation for LDAP.","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.","published":"2017-07-20T23:29:00.000Z","lastModified":"2026-06-17T01:01:54.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-295"],"affected":["nixos project/nixos"],"epss":{"score":0.00875,"percentile":0.58776,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.88%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://openwall.com/lists/oss-security/2017/07/20/1","tags":["Mailing List","Mitigation","Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/NixOS/nixpkgs/issues/27506","tags":["Issue Tracking","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://groups.google.com/forum/#%21topic/nix-security-announce/qrDU0KH_ZRk","source":"cve@mitre.org"},{"url":"http://openwall.com/lists/oss-security/2017/07/20/1","tags":["Mailing List","Mitigation","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/NixOS/nixpkgs/issues/27506","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://groups.google.com/forum/#%21topic/nix-security-announce/qrDU0KH_ZRk","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-11501","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}