Vulnerabilities in pkg:gem/consul

PACKAGE
Advisory Identifier: GHSA-8jhx-9gf4-hhf5
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Advisory Summary

CVE-2019-16377 is a CRITICAL (CVSS 9.8) consul gem insufficient authentication check vulnerability (CWE-284: Improper Access Control) affecting Consul libraries in the RubyGems ecosystem. The issue involves consul gem insufficient authentication check - multiple powers in one controller are not always checked correctly. Remediation is available by upgrading affected packages to version 1.0.3.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:gem/consul

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:gem/consul. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-8jhx-9gf4-hhf5 CVE-2019-16377 CRITICAL Consul gem insufficient authentication check - Multiple powers in one controller are not always checked correctly

CVE-2019-16377 at a Glance

CVE Identifier CVE-2019-16377
GHSA Identifier GHSA-8jhx-9gf4-hhf5
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-284: Improper Access Control
Affected Product Consul
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2019-16377

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

consul fixed: 1.0.3 
Upgrade consul to 1.0.3
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 consul

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-16377, inspect your project dependencies for Consul:

inspect dependencies for consul

Analyze the terminal output to locate any version of Consul in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.3), 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-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Consul, 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

With the consul ruby gem before 1.0.3, if a controller checks multiple powers using `:if` or `:except` conditions, these conditions are erroneously applied to all power checks in that controller. This can lead to skipped power checks and hence unauthenticated access to certain controller actions.

CVE-2019-16377 Affected Consul Versions

1 component(s)
Fixed Versions:
1.0.3
Product / Package Ecosystem Affected Versions Fixed Version
consul
gem/consul
RubyGems
< 1.0.3
1.0.3

References

NVD — CVE-2019-16377 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16377
Consul Source Repository REPOSITORY
https://github.com/makandra/consul/issues/49
Consul Source Repository REPOSITORY
https://github.com/makandra/consul
Consul Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/c26fbc13435b8be448ad59131428538049d165e4/gems/consul/CVE-2019-16377.yml
Consul Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/consul/CVE-2019-16377.yml
rubygems.org/gems/consul WEB
https://rubygems.org/gems/consul

Frequently Asked Questions

What is CVE-2019-16377?
CVE-2019-16377 is a security vulnerability in Consul involving Consul gem insufficient authentication check - Multiple powers in one controller are not always checked correctly under CWE-284: Improper Access Control.
Which Consul versions are affected?
Affected versions include releases prior to 1.0.3 across affected packages: consul.
What version fixes CVE-2019-16377?
Upgrading to 1.0.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is consul affected?
Yes, consul is affected in releases prior to 1.0.3. Upgrade your dependency to 1.0.3 or later.
What is the CVSS score of CVE-2019-16377?
CVE-2019-16377 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-16377?
CVE-2019-16377 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check RubyGems dependencies for CVE-2019-16377?
Run the dependency tree command: 'inspect dependencies for consul'. 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-8jhx-9gf4-hhf5",
  "modified" : "2023-08-29T11:51:45Z",
  "published" : "2019-09-27T20:01:00Z",
  "aliases" : [ "CVE-2019-16377" ],
  "summary" : "Consul gem insufficient authentication check - Multiple powers in one controller are not always checked correctly",
  "details" : "With the consul ruby gem before 1.0.3, if a controller checks multiple powers  using `:if` or `:except` conditions, these conditions are erroneously applied to all power checks in that controller. This can lead to skipped power checks and hence unauthenticated access to certain controller actions.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-16377"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/makandra/consul/issues/49"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/makandra/consul"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/c26fbc13435b8be448ad59131428538049d165e4/gems/consul/CVE-2019-16377.yml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/consul/CVE-2019-16377.yml"
  }, {
    "type" : "WEB",
    "url" : "https://rubygems.org/gems/consul"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-09-25T01:09:01Z",
    "nvd_published_at" : "2019-09-23T16:15:00Z"
  }
}