CVE-2021-32574: Github.com/hashicorp/consul Hashicorp Consul Missing SSL Certificate Vulnerability

HIGH
Advisory Identifier: GHSA-25gf-8qrr-g78r
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CVSS 7.5
CWE-295
Published
Advisory Summary

CVE-2021-32574 is a HIGH (CVSS 7.5) hashicorp consul missing ssl certificate vulnerability (CWE-295: Improper Certificate Validation) affecting Github.com/hashicorp/consul libraries in the Go ecosystem. The issue involves hashicorp consul missing ssl certificate validation. Remediation is available by upgrading affected packages to version 1.10.1.

CVE-2021-32574 at a Glance

CVE Identifier CVE-2021-32574
GHSA Identifier GHSA-25gf-8qrr-g78r
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Github.com/hashicorp/consul
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/I:H/A:N).

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 None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2021-32574

To remediate this vulnerability, upgrade all affected Github.com/hashicorp/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.

github.com/hashicorp/consul fixed: 1.10.1 
Upgrade github.com/hashicorp/consul to 1.10.1
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 github.com/hashicorp/consul

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-32574, inspect your project dependencies for Github.com/hashicorp/consul:

inspect dependencies for github.com/hashicorp/consul

Analyze the terminal output to locate any version of Github.com/hashicorp/consul in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.10.1), 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 Github.com/hashicorp/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

HashiCorp Consul before 1.10.1 (and Consul Enterprise) has Missing SSL Certificate Validation. xds does not ensure that the Subject Alternative Name of an upstream is validated.

CVE-2021-32574 Affected Github.com/hashicorp/consul Versions

1 component(s)
Fixed Versions:
1.10.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
< 1.10.1
1.10.1

References

NVD — CVE-2021-32574 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32574
discuss.hashicorp.com/t/hcsec-2021-17-con... WEB
https://discuss.hashicorp.com/t/hcsec-2021-17-consul-s-envoy-tls-configuration-did-not-validate-destination-service-subject-alternative-names/26856
Github.com/hashicorp/consul Release RELEASE
https://github.com/hashicorp/consul/releases/tag/v1.10.1
Github.com/hashicorp/consul Security Information SECURITY
https://security.gentoo.org/glsa/202208-09
www.hashicorp.com/blog/category/consu... WEB
https://www.hashicorp.com/blog/category/consul

Frequently Asked Questions

What is CVE-2021-32574?
CVE-2021-32574 is a security vulnerability in Github.com/hashicorp/consul involving Hashicorp Consul Missing SSL Certificate Validation under CWE-295: Improper Certificate Validation.
Which Github.com/hashicorp/consul versions are affected?
Affected versions include releases prior to 1.10.1 across affected packages: github.com/hashicorp/consul.
What version fixes CVE-2021-32574?
Upgrading to 1.10.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/hashicorp/consul affected?
Yes, github.com/hashicorp/consul is affected in releases prior to 1.10.1. Upgrade your dependency to 1.10.1 or later.
What is the CVSS score of CVE-2021-32574?
CVE-2021-32574 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2021-32574?
CVE-2021-32574 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check Go dependencies for CVE-2021-32574?
Run the dependency tree command: 'inspect dependencies for github.com/hashicorp/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-25gf-8qrr-g78r",
  "modified" : "2022-08-11T20:43:48Z",
  "published" : "2021-07-19T21:21:03Z",
  "aliases" : [ "CVE-2021-32574" ],
  "summary" : "Hashicorp Consul Missing SSL Certificate Validation",
  "details" : "HashiCorp Consul before 1.10.1 (and Consul Enterprise) has Missing SSL Certificate Validation. xds does not ensure that the Subject Alternative Name of an upstream is validated.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.10.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-32574"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/hcsec-2021-17-consul-s-envoy-tls-configuration-did-not-validate-destination-service-subject-alternative-names/26856"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/releases/tag/v1.10.1"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202208-09"
  }, {
    "type" : "WEB",
    "url" : "https://www.hashicorp.com/blog/category/consul"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-19T17:36:42Z",
    "nvd_published_at" : "2021-07-17T18:15:00Z"
  }
}