How severe is CVE-2017-11501?

CVE-2017-11501 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-11501 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-11501?

CVE-2017-11501 affects Nixos Project Nixos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-11501?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-11501 published?

CVE-2017-11501 was published on 2017-07-20 and last updated on 2026-06-17.

CVE-2017-11501

CVE-2017-11501 is a medium-severity vulnerability in Nixos Project Nixos with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Nixos Project Nixos
Published: 2017-07-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2017-11501?: CVE-2017-11501 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-11501 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-11501?: CVE-2017-11501 affects Nixos Project Nixos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-11501?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-11501 published?: CVE-2017-11501 was published on 2017-07-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:nixos_project:nixos:*:*:*:*:*:*:*:*

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