CVE-2020-13250: Github.com/hashicorp/consul Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-rqjq-mrgx-85hp
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CVSS 7.5
CWE-770
Published
Advisory Summary

CVE-2020-13250 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Github.com/hashicorp/consul libraries in the Go ecosystem. The issue involves allocation of resources without limits or throttling in hashicorp consul. Remediation is available by upgrading affected packages to version 1.6.6, 1.7.4.

CVE-2020-13250 at a Glance

CVE Identifier CVE-2020-13250
GHSA Identifier GHSA-rqjq-mrgx-85hp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
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:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2020-13250

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: 1.6.6 
Upgrade github.com/hashicorp/consul to 1.6.6
github.com/hashicorp/consul fixed: 1.7.4 
Upgrade github.com/hashicorp/consul to 1.7.4
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-2020-13250, 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 1.6.6), 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-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. 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 and Consul Enterprise include an HTTP API (introduced in 1.2.0) and DNS (introduced in 1.4.3) caching feature that was vulnerable to denial of service. ### Specific Go Packages Affected github.com/hashicorp/consul/agent/config ### Fix The vulnerability is fixed in versions 1.6.6 and 1.7.4.

CVE-2020-13250 Affected Github.com/hashicorp/consul Versions

2 component(s)
Fixed Versions:
1.6.61.7.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
≥ 1.2.0
< 1.6.6
1.6.6
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
≥ 1.7.0
< 1.7.4
1.7.4

References

NVD — CVE-2020-13250 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-13250
Github.com/hashicorp/consul Source Repository REPOSITORY
https://github.com/hashicorp/consul/pull/8023
Security Fix Commit FIX COMMIT
https://github.com/hashicorp/consul/commit/72f92ae7ca4cabc1dc3069362a9b64ef46941432
Github.com/hashicorp/consul Source Repository REPOSITORY
https://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
Github.com/hashicorp/consul Source Repository REPOSITORY
https://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md

Frequently Asked Questions

What is CVE-2020-13250?
CVE-2020-13250 is a security vulnerability in Github.com/hashicorp/consul involving Allocation of Resources Without Limits or Throttling in Hashicorp Consul under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Github.com/hashicorp/consul versions are affected?
Affected versions include releases prior to 1.6.6, 1.7.4 across affected packages: github.com/hashicorp/consul.
What version fixes CVE-2020-13250?
Upgrading to 1.6.6, 1.7.4 (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 1.6.6, 1.7.4. Upgrade your dependency to 1.6.6, 1.7.4 or later.
What is the CVSS score of CVE-2020-13250?
CVE-2020-13250 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:N/A:H.
What CWE is associated with CVE-2020-13250?
CVE-2020-13250 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check Go dependencies for CVE-2020-13250?
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-rqjq-mrgx-85hp",
  "modified" : "2023-10-02T14:01:45Z",
  "published" : "2021-05-18T18:21:35Z",
  "aliases" : [ "CVE-2020-13250" ],
  "summary" : "Allocation of Resources Without Limits or Throttling in Hashicorp Consul",
  "details" : "HashiCorp Consul and Consul Enterprise include an HTTP API (introduced in 1.2.0) and DNS (introduced in 1.4.3) caching feature that was vulnerable to denial of service.\n\n### Specific Go Packages Affected\ngithub.com/hashicorp/consul/agent/config\n\n### Fix\nThe vulnerability is fixed in versions 1.6.6 and 1.7.4.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.2.0"
      }, {
        "fixed" : "1.6.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.7.0"
      }, {
        "fixed" : "1.7.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-13250"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/pull/8023"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/commit/72f92ae7ca4cabc1dc3069362a9b64ef46941432"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-12T22:00:34Z",
    "nvd_published_at" : "2020-06-11T20:15:00Z"
  }
}