CVE-2017-17718: Net ldap Improper Certificate Validation Vulnerability

MODERATE
Advisory Identifier: GHSA-m7p8-9w66-9frm
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CVSS 5.9
CWE-295
Published
Advisory Summary

CVE-2017-17718 is a MODERATE (CVSS 5.9) improper certificate validation vulnerability (CWE-295: Improper Certificate Validation) affecting Net ldap libraries in the RubyGems ecosystem. The issue involves net-ldap improper certificate validation vulnerability. Remediation is available by upgrading affected packages to version 0.16.0.

CVE-2017-17718 at a Glance

CVE Identifier CVE-2017-17718
GHSA Identifier GHSA-m7p8-9w66-9frm
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Net ldap
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2017-17718

To remediate this vulnerability, upgrade all affected Net ldap dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

net-ldap fixed: 0.16.0 
Upgrade net-ldap to 0.16.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for net-ldap

How to Check if You Are Affected

To determine whether your application is affected by CVE-2017-17718, inspect your project dependencies for Net ldap:

inspect dependencies for net-ldap

Analyze the terminal output to locate any version of Net ldap in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.16.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Net ldap, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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

CVE-2017-17718 Affected Net ldap Versions

1 component(s)
Fixed Versions:
0.16.0
Product / Package Ecosystem Affected Versions Fixed Version
net-ldap
gem/net-ldap
RubyGems
< 0.16.0
0.16.0

References

NVD — CVE-2017-17718 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-17718
Net ldap Source Repository REPOSITORY
https://github.com/ruby-ldap/ruby-net-ldap/issues/258
Net ldap Source Repository REPOSITORY
https://github.com/ruby-ldap/ruby-net-ldap/pull/279
Net ldap Source Repository REPOSITORY
https://github.com/ruby-ldap/ruby-net-ldap
Net ldap Security Information SECURITY
http://openwall.com/lists/oss-security/2017/12/17/10

Frequently Asked Questions

What is CVE-2017-17718?
CVE-2017-17718 is a security vulnerability in Net ldap involving net-ldap Improper Certificate Validation vulnerability under CWE-295: Improper Certificate Validation.
Which Net ldap versions are affected?
Affected versions include releases prior to 0.16.0 across affected packages: net-ldap.
What version fixes CVE-2017-17718?
Upgrading to 0.16.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is net-ldap affected?
Yes, net-ldap is affected in releases prior to 0.16.0. Upgrade your dependency to 0.16.0 or later.
What is the CVSS score of CVE-2017-17718?
CVE-2017-17718 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2017-17718?
CVE-2017-17718 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check RubyGems dependencies for CVE-2017-17718?
Run the dependency tree command: 'inspect dependencies for net-ldap'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m7p8-9w66-9frm",
  "modified" : "2023-01-23T21:24:13Z",
  "published" : "2018-01-06T01:11:34Z",
  "aliases" : [ "CVE-2017-17718" ],
  "summary" : "net-ldap Improper Certificate Validation vulnerability",
  "details" : "The Net::LDAP (aka net-ldap) gem before 0.16.0 for Ruby has Missing SSL Certificate Validation.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "net-ldap"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.16.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-17718"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ruby-ldap/ruby-net-ldap/issues/258"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ruby-ldap/ruby-net-ldap/pull/279"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ruby-ldap/ruby-net-ldap"
  }, {
    "type" : "WEB",
    "url" : "http://openwall.com/lists/oss-security/2017/12/17/10"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:45:19Z",
    "nvd_published_at" : null
  }
}