JetBrains TeamCity - Guest User Access Enabled

ID: teamcity-guest-login-enabled

Severity: high

Author: Ph33r

Tags: misconfig,teamcity,jetbrains

Description

TeamCity provides the ability to turn on the guest login allowing anonymous access to the TeamCity UI.

YAML Source

id: teamcity-guest-login-enabled

info:
  name: JetBrains TeamCity - Guest User Access Enabled
  author: Ph33r
  severity: high
  description: |
    TeamCity provides the ability to turn on the guest login allowing anonymous access to the TeamCity UI.
  reference:
    - https://ph33r.medium.com/misconfig-in-teamcity-panel-lead-to-auth-bypass-in-apache-org-exploit-146f6a1a4e2b
    - https://www.jetbrains.com/help/teamcity/guest-user.html
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 7.3
    cwe-id: CWE-200
    cpe: cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    shodan-query: http.component:"TeamCity"
    product: teamcity
    vendor: jetbrains
  tags: misconfig,teamcity,jetbrains

http:
  - raw:
      - |
        GET /guestLogin.html?guest=1 HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - 'Location: /overview.html'
          - 'TCSESSIONID='
        condition: and

      - type: status
        status:
          - 302
# digest: 490a0046304402201f9810bed8b6ddc0f68da422519156ddb5acea878ae2b99be2bc13a78f1dcb6d022028bed7855d20fb1f99d0415b00f9b9f8a4308cc80b15c791f6870dfbf0622b06:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/misconfiguration/teamcity/teamcity-guest-login-enabled.yaml"

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