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CVE-2017-11501

16
FAUCET Score

CVE-2017-11501 describes a vulnerability in NixOS 17.03 and earlier where the users.ldap module, when configured to use TLS for LDAP authentication, unconditionally disables peer certificate validation. This medium-severity flaw (CVSS 5.9) allows an attacker to intercept or tamper with LDAP traffic without detection, potentially leading to unauthorized access (CWE-295). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 17.03CPE matchmatch criteria
cpe:2.3:o:nixos_project:nixos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.88%
Probability of exploitation in next 30 days
EPSS Percentile
55.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0088 is in the 13th percentile among its peer group of 19,956 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

openwall.com / lists/oss-security/2017/07/20/1
Mailing ListMitigationPatchThird Party Advisory
github.com / NixOS/nixpkgs/issues/27506
Issue TrackingThird Party Advisory
groups.google.com / forum