CVE-2020-25864: Github.com/hashicorp/consul Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-8xmx-h8rq-h94j
Share
CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2020-25864 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Github.com/hashicorp/consul libraries in the Go ecosystem. The issue involves hashicorp consul cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 1.9.5, 1.8.10, 1.7.14.

CVE-2020-25864 at a Glance

CVE Identifier CVE-2020-25864
GHSA Identifier GHSA-8xmx-h8rq-h94j
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Github.com/hashicorp/consul
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

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

How to Fix CVE-2020-25864

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: 1.9.5 
Upgrade github.com/hashicorp/consul to 1.9.5
github.com/hashicorp/consul fixed: 1.8.10 
Upgrade github.com/hashicorp/consul to 1.8.10
github.com/hashicorp/consul fixed: 1.7.14 
Upgrade github.com/hashicorp/consul to 1.7.14
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-2020-25864, 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 1.9.5), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. 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 up to version 1.9.4 key-value (KV) raw mode was vulnerable to cross-site scripting. Fixed in 1.9.5, 1.8.10 and 1.7.14.

CVE-2020-25864 Affected Github.com/hashicorp/consul Versions

3 component(s)
Fixed Versions:
1.9.51.8.101.7.14
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
≥ 1.9.0
< 1.9.5
1.9.5
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
≥ 1.8.0
< 1.8.10
1.8.10
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
< 1.7.14
1.7.14

References

NVD — CVE-2020-25864 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25864
discuss.hashicorp.com/t/hcsec-2021-07-con... WEB
https://discuss.hashicorp.com/t/hcsec-2021-07-consul-api-kv-endpoint-vulnerable-to-cross-site-scripting/23368
Github.com/hashicorp/consul Source Repository REPOSITORY
https://github.com/hashicorp/consul
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-2020-25864?
CVE-2020-25864 is a security vulnerability in Github.com/hashicorp/consul involving HashiCorp Consul Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Github.com/hashicorp/consul versions are affected?
Affected versions include releases prior to 1.9.5, 1.8.10, 1.7.14 across affected packages: github.com/hashicorp/consul.
What version fixes CVE-2020-25864?
Upgrading to 1.9.5, 1.8.10, 1.7.14 (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 1.9.5, 1.8.10, 1.7.14. Upgrade your dependency to 1.9.5, 1.8.10, 1.7.14 or later.
What is the CVSS score of CVE-2020-25864?
CVE-2020-25864 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2020-25864?
CVE-2020-25864 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Go dependencies for CVE-2020-25864?
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-8xmx-h8rq-h94j",
  "modified" : "2023-06-09T23:23:51Z",
  "published" : "2022-05-24T17:48:04Z",
  "aliases" : [ "CVE-2020-25864" ],
  "summary" : "HashiCorp Consul Cross-site Scripting vulnerability",
  "details" : "HashiCorp Consul and Consul Enterprise up to version 1.9.4 key-value (KV) raw mode was vulnerable to cross-site scripting. Fixed in 1.9.5, 1.8.10 and 1.7.14.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.9.0"
      }, {
        "fixed" : "1.9.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.8.0"
      }, {
        "fixed" : "1.8.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.7.14"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-25864"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/hcsec-2021-07-consul-api-kv-endpoint-vulnerable-to-cross-site-scripting/23368"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/hashicorp/consul"
  }, {
    "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-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-09T23:23:51Z",
    "nvd_published_at" : "2021-04-20T16:15:00Z"
  }
}