How severe is CVE-2017-17718?

CVE-2017-17718 has a CVSS score of 5.9/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2017-17718?

CVE-2017-17718 affects the following packages: net-ldap (RubyGems). Ecosystems affected: RubyGems.

How do I fix CVE-2017-17718?

Update net-ldap to 0.16.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-17718 is resolved across your whole dependency graph.

How do I detect CVE-2017-17718 in my RubyGems dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for net-ldap, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2017-17718 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2017-17718 actively exploited in the wild?

No public exploit code has been indexed for CVE-2017-17718 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2017-17718?

CVE-2017-17718 has an EPSS (Exploit Prediction Scoring System) score of 1.3%, placing it in the 71th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2017-17718?

CVE-2017-17718 is classified as CWE-295 (CWE-295). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2017-17718 published, and has it been updated?

CVE-2017-17718 was published on December 17, 2017 and was last updated on October 20, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎

💎 RubyGems

Not in CISA KEV

MEDIUM severity

CVE-2017-17718 — net-ldap

MEDIUMFix: ruby-ldap/ruby-net-ldap#279

CVE-2017-17718 is a medium-severity (CVSS 5.9) CWE-295 vulnerability in net-ldap. A fix is available for net-ldap — see the affected versions and patch details below.

net-ldap Improper Certificate Validation vulnerability

Also known asGHSA-m7p8-9w66-9frm

Published

Dec 17, 2017

Updated

Oct 20, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 24, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs71th percentile — riskier than 71% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

💎net-ldap

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.

Description

The Net::LDAP (aka net-ldap) gem before 0.16.0 for Ruby has Missing SSL Certificate Validation.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`net-ldap`	all versions	0.16.0`bundle update net-ldap --conservative`

Affected Products

1 product · 22 configurations

Application

net-ldapnet-ldap_project

22 versions

0.0.50.1.00.1.10.20.2.10.2.20.3.00.3.10.5.10.6.00.6.10.7.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for net-ldap, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update net-ldap to 0.16.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-17718 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

This issue affects the versions of rubygem-net-ldap as shipped with Red Hat Subscription Asset Manager 1 and Satellite version 6. Red Hat Product Security has rated this issue as having Moderate security impact. No update is planned at this time however a future update may address this issue. For additional…

Product	Fixed in	Advisory
Red Hat Satellite 6.7 for RHEL 7	`ansiblerole-foreman_scap_client-0:0.0.3-1.el7sat`	RHSA-2020:1454

Frequently Asked Questions

The Net::LDAP (aka net-ldap) gem before 0.16.0 for Ruby has Missing SSL Certificate Validation.

O3 Security · Impact-Aware SCA

Is CVE-2017-17718 in your dependencies?

Find it across RubyGems, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.9/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Raw vector

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

CWE Classification

CWE-295CWE-295

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

ruby-net-ldap

3.8/10

Maintained7/10

Code-Review4/10

Branch-Protection3/10

Assessed Oct 19, 2026

Timeline

Disclosed

Dec 17, 2017

Last updated

Oct 20, 2026

Identifiers

CVE-2017-17718

GHSA-m7p8-9w66-9frm

References

Advisorynvd.nist.gov · CVE 2017 17718 Fixgithub.com Fixgithub.com Reportopenwall.com Packagegithub.com · ruby net ldap

Related vulnerabilities

Also affects net-ldap

This CVE is medium severity, in line with the other 1 CVE affecting net-ldap.

CVE-2014-0083

Same weakness: CWE-295

This CVE is medium severity; 6 of 7 other CVEs with CWE-295 are rated as high or higher (top: critical).

CVE-2026-118780CVE-2026-119190GHSA-5xjx-3w67-w9x9CVE-2026-109383GHSA-6q48-6c7w-9gw2GHSA-hq85-5cpj-mr62CVE-2026-70194Browse all CWE-295

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026

CVE-2017-17718 — net-ldap

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2017-17718 in your dependencies?