CVE-2020-35177: Github.com/hashicorp/vault Enumeration Of Users Vulnerability

MODERATE
Advisory Identifier: GHSA-rpgp-9hmg-j25x
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CVSS 6.5
CWE-200
Published
Advisory Summary

CVE-2020-35177 is a MODERATE (CVSS 6.5) enumeration of users vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Github.com/hashicorp/vault libraries in the Go ecosystem. The issue involves enumeration of users in hashicorp vault. Remediation is available by upgrading affected packages to version 1.5.6, 1.6.1.

CVE-2020-35177 at a Glance

CVE Identifier CVE-2020-35177
GHSA Identifier GHSA-rpgp-9hmg-j25x
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Github.com/hashicorp/vault
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

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:L/I:L/A:N/E:U/RL:O/RC:R).

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 Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2020-35177

To remediate this vulnerability, upgrade all affected Github.com/hashicorp/vault 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/vault fixed: 1.5.6 
Upgrade github.com/hashicorp/vault to 1.5.6
github.com/hashicorp/vault fixed: 1.6.1 
Upgrade github.com/hashicorp/vault to 1.6.1
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/vault

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-35177, inspect your project dependencies for Github.com/hashicorp/vault:

inspect dependencies for github.com/hashicorp/vault

Analyze the terminal output to locate any version of Github.com/hashicorp/vault in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.5.6), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Github.com/hashicorp/vault, 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 Vault and Vault Enterprise allowed the enumeration of users via the LDAP auth method. Fixed in 1.5.6 and 1.6.1.

CVE-2020-35177 Affected Github.com/hashicorp/vault Versions

2 component(s)
Fixed Versions:
1.5.61.6.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/vault
golang/github.com/hashicorp/vault
Go
≥ 1.5.0
< 1.5.6
1.5.6
github.com/hashicorp/vault
golang/github.com/hashicorp/vault
Go
≥ 1.6.0
< 1.6.1
1.6.1

References

NVD — CVE-2020-35177 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35177
Github.com/hashicorp/vault Source Repository REPOSITORY
https://github.com/hashicorp/vault/pull/10537
discuss.hashicorp.com/t/hcsec-2020-25-vau... WEB
https://discuss.hashicorp.com/t/hcsec-2020-25-vault-s-ldap-auth-method-allows-user-enumeration/18984
Github.com/hashicorp/vault Source Repository REPOSITORY
https://github.com/hashicorp/vault/blob/master/CHANGELOG.md#161

Frequently Asked Questions

What is CVE-2020-35177?
CVE-2020-35177 is a security vulnerability in Github.com/hashicorp/vault involving Enumeration of users in HashiCorp Vault under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Github.com/hashicorp/vault versions are affected?
Affected versions include releases prior to 1.5.6, 1.6.1 across affected packages: github.com/hashicorp/vault.
What version fixes CVE-2020-35177?
Upgrading to 1.5.6, 1.6.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/hashicorp/vault affected?
Yes, github.com/hashicorp/vault is affected in releases prior to 1.5.6, 1.6.1. Upgrade your dependency to 1.5.6, 1.6.1 or later.
What is the CVSS score of CVE-2020-35177?
CVE-2020-35177 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:R.
What CWE is associated with CVE-2020-35177?
CVE-2020-35177 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Go dependencies for CVE-2020-35177?
Run the dependency tree command: 'inspect dependencies for github.com/hashicorp/vault'. 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-rpgp-9hmg-j25x",
  "modified" : "2024-01-31T23:11:40Z",
  "published" : "2024-01-31T23:11:40Z",
  "aliases" : [ "CVE-2020-35177" ],
  "summary" : "Enumeration of users in HashiCorp Vault",
  "details" : "HashiCorp Vault and Vault Enterprise allowed the enumeration of users via the LDAP auth method. Fixed in 1.5.6 and 1.6.1.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:R"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/vault"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.5.0"
      }, {
        "fixed" : "1.5.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/vault"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.6.0"
      }, {
        "fixed" : "1.6.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35177"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/vault/pull/10537"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/hcsec-2020-25-vault-s-ldap-auth-method-allows-user-enumeration/18984"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/vault/blob/master/CHANGELOG.md#161"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-31T23:11:40Z",
    "nvd_published_at" : "2020-12-17T05:15:00Z"
  }
}