Vulnerability Details : CVE-2017-11501
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.
Products affected by CVE-2017-11501
- cpe:2.3:o:nixos_project:nixos:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-11501
0.15%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 32 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-11501
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
5.9
|
MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
2.2
|
3.6
|
NIST |
CWE ids for CVE-2017-11501
-
The product does not validate, or incorrectly validates, a certificate.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-11501
-
https://github.com/NixOS/nixpkgs/issues/27506
Enabling TLS via `users.ldap` disables peer checking · Issue #27506 · NixOS/nixpkgs · GitHubIssue Tracking;Third Party Advisory
-
http://openwall.com/lists/oss-security/2017/07/20/1
oss-security - NIX-2017-0003: LDAP with useTLS option disabled TLS peer verificationMailing List;Mitigation;Patch;Third Party Advisory
-
https://groups.google.com/forum/#!topic/nix-security-announce/qrDU0KH_ZRk
NIX-2017-0003: LDAP with useTLS disabled TLS peer verification - Google GroepenMitigation;Third Party Advisory
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