SSLセットアップが必要なドメインを後ろにする by lobin-z0x50 · Pull Request #63 · neogenia-jp/EzGate

lobin-z0x50 · 2026-03-06T14:07:40Z

TODO

テストコード
実環境で動作検証

gemini-code-assist · 2026-03-06T14:08:01Z

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

このプルリクエストは、NginxのSSL設定プロセス、特にLet's Encryptを使用した証明書生成と更新の堅牢性を向上させることを目的としています。ドメインのSSLセットアップ状況に基づいて処理の優先順位を付けることで、設定の書き出しとNginxのリロードがより安全かつ効率的に行われるようになり、証明書生成中のサービス中断リスクを低減します。また、FORCE_MODE時の挙動も改善され、より柔軟な運用が可能になります。

Highlights

SSLセットアップ優先度ロジックの追加: SSLセットアップの優先度を判断するssl_setup_priorityメソッドをconfig.rbに追加しました。これにより、HTTPS非対応、セットアップ済み、要セットアップの3つの状態を識別します。
Nginx設定テストとリロードの強化: Nginx設定生成後にnginx -tで設定ファイルの構文チェックを行い、Let's Encryptセットアップ後にnginx -s reloadでNginxをリロードする処理を追加しました。
SSLセットアップ処理順序の最適化: reload_config.rbにおいて、SSLセットアップが必要なドメインを最後に処理するように、設定の処理順序をSSLセットアップ優先度に基づいて変更しました。これにより、Nginxのリロード時のアクセスエラーを防ぎます。
FORCE_MODE時の挙動改善: FORCE_MODEが有効な場合、既にSSLがセットアップされているドメイン（2:installed）に対してもLet's Encryptの再セットアップを強制実行するロジックを追加しました。
Nginxリロードコマンドの変更: Nginxのリロードコマンドをservice nginx reloadからnginx -s reloadに変更しました。

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Changelog

src/app/lib/config.rb
- SSLセットアップの優先度を返すssl_setup_priorityメソッドを追加しました。
- HTTPS非対応の場合のNginx設定レンダリング後にnginx -tコマンドを追加しました。
- Let's Encryptセットアップ後にnginx -s reloadコマンドを追加しました。
src/app/reload_config.rb
- configurationsをssl_setup_priorityに基づいてグループ化し、処理順序をソートするように変更しました。
- config.generate_nginx_configの呼び出しからENV['FORCE_MODE']引数を削除しました。
- FORCE_MODEが有効な場合に、2:installed状態のドメインに対してLet's Encryptの再セットアップを強制実行するロジックを追加しました。
- Nginxのリロードコマンドをservice nginx reloadからnginx -s reloadに変更しました。

Activity

このプルリクエストは、Issue #39の修正を目的としています。
現在のところ、テストコードの追加と実環境での動作検証がTODOリストとして挙げられています。

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Code Review

This pull request intends to prioritize SSL certificate setup and integrate FORCE_MODE. However, it introduces critical security vulnerabilities, including command injection in the SSL setup process due to unsanitized domain names and email addresses, and a path traversal vulnerability when checking for existing certificates. Furthermore, reload_config.rb contains significant logic errors, such as incorrect method calls on Hash objects, variable scoping issues, and improper loop nesting, particularly within the FORCE_MODE implementation, which could lead to crashes and incorrect behavior. Immediate remediation is required to sanitize all external inputs and correct the identified logic flaws.

gemini-code-assist · 2026-03-06T14:10:05Z

          shell_exec 'nginx -t'
+          shell_exec 'nginx -s reload'

          LetsEncrypt.setup self


The call to LetsEncrypt.setup self triggers a command injection vulnerability. The LetsEncrypt.setup method (in src/app/lib/lets_encrypt.rb) takes the Config object and interpolates its domain and cert_email attributes directly into a shell command string passed to shell_exec. Since these attributes are derived from untrusted sources like environment variables (PROXY_TO, CERT_EMAIL) without sanitization, an attacker can execute arbitrary commands by injecting shell metacharacters (e.g., ;, $(...), `...`) into the domain or email.

gemini-code-assist · 2026-03-06T14:10:05Z

+      grouped['2:installed'].each do |config|
+        configs.each do |config|
+          log "----- start setup of Let's Encrypt for #{config.domain} -----"
+          config.generate_nginx_config force: true


The call to config.generate_nginx_config force: true leads to a command injection vulnerability. The domain attribute of the config object is eventually used in a shell command (via LetsEncrypt.setup) without proper sanitization. An attacker controlling the PROXY_TO environment variable can inject arbitrary shell commands.

gemini-code-assist · 2026-03-06T14:10:05Z

+    if ENV['FORCE_MODE']
+      log "========== #{type} FORCE re-install =========="
+      grouped['2:installed'].each do |config|
+        configs.each do |config|
+          log "----- start setup of Let's Encrypt for #{config.domain} -----"
+          config.generate_nginx_config force: true
+        end
+      end
    end


This block contains a critical logic error and potential crash in the FORCE_MODE handling, which could lead to incorrect processing and potential Denial of Service through repeated certificate requests. Specifically, variables like type and configs are out of scope from previous blocks (lines 65-71), causing a NameError. The inner loop (line 80) incorrectly iterates over configs instead of config, shadowing the loop variable. Additionally, grouped['2:installed'] (line 79) might return nil if grouped becomes an array, leading to an error on .each, and the variable type at line 78 is out of scope, potentially causing unintended log output. The overall nesting of loops for FORCE_MODE processing (lines 79-84) is also incorrect.

if ENV['FORCE_MODE'] log "========== 2:installed FORCE re-install ==========" grouped['2:installed']&.each do |config| log "----- start setup of Let's Encrypt for #{config.domain} -----" config.generate_nginx_config force: true end end

gemini-code-assist · 2026-03-06T14:10:05Z

+    # HTTPS 対応版
+    unless cert_file
+      # 証明書ファイルが指定されていなければ、Let's Encrypt を使って生成する
+      if !File.exist?("/etc/letsencrypt/live/#{domain}")


The domain attribute is used directly to construct a file path in File.exist?("/etc/letsencrypt/live/#{domain}"). If an attacker can control the domain value (e.g., via the PROXY_TO environment variable), they can use path traversal sequences like ../ to check for the existence of arbitrary files on the system, leading to information disclosure.

lobin-z0x50 · 2026-03-25T07:01:07Z

エビデンス

https://drive.google.com/file/d/1qHngsBxlCvrCsY7scuwAUsf7HprEQBEG/view?usp=drive_link

haruyan-hopemucci

レビューOKです! ありがとうございました!

haruyan-hopemucci · 2026-03-27T01:30:52Z

+  def ssl_setup_priority
+    return  "1:no_installation" if @no_ssl


haruyan-hopemucci · 2026-03-27T01:31:19Z

+require_relative './config'
+require_relative './socat_manager'
+
+class ReloadController


👍
Reload処理のクラス化ナイスです!

haruyan-hopemucci · 2026-03-27T01:31:40Z

+require_relative 'test_helper'
+require 'lib/reload_controller'
+
+class ReloadControllerTest < Minitest::Test


👍
テスト作成ありがとうございます!

haruyan-hopemucci · 2026-03-27T01:31:50Z

+    config_no_ssl  = MockConfig.new("no-ssl.example.com",       "1:no_installation")
+    config_installed = MockConfig.new("installed.example.com",  "2:installed")
+
+    # 意図的に優先度の逆順で渡す


lobin-z0x50 changed the title ~~SSLセットアップ順を優先度ごとに。FORCE_MODEの考慮~~ [二割共有]SSLセットアップ順を優先度ごとに。FORCE_MODEの考慮 Mar 6, 2026

gemini-code-assist Bot reviewed Mar 6, 2026

View reviewed changes

lobin-z0x50 force-pushed the fix/nginx-config-setup-ordered-by-priority branch from aec79af to 451995d Compare March 6, 2026 15:27

lobin-z0x50 changed the title ~~[二割共有]SSLセットアップ順を優先度ごとに。FORCE_MODEの考慮~~ [６割共有]SSLセットアップが必要なドメインを後ろにする Mar 6, 2026

lobin-z0x50 added 4 commits March 25, 2026 14:44

feat: SSLセットアップ順を優先度ごとに。FORCE_MODEの考慮

94a4164

refactor: reload_config の中身をクラス化

a7ca697

test: ReloadController のテストコード

f1bbe24

fix: reload_config より先に nginx を起動

34a9842

lobin-z0x50 force-pushed the fix/nginx-config-setup-ordered-by-priority branch from 451995d to 34a9842 Compare March 25, 2026 06:20

lobin-z0x50 requested a review from haruyan-hopemucci March 25, 2026 07:01

lobin-z0x50 changed the title ~~[６割共有]SSLセットアップが必要なドメインを後ろにする~~ SSLセットアップが必要なドメインを後ろにする Mar 25, 2026

haruyan-hopemucci approved these changes Mar 27, 2026

View reviewed changes

haruyan-hopemucci merged commit 87acf14 into master Mar 27, 2026
1 check passed

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SSLセットアップが必要なドメインを後ろにする - #63

SSLセットアップが必要なドメインを後ろにする#63
haruyan-hopemucci merged 4 commits into
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fix/nginx-config-setup-ordered-by-priority

lobin-z0x50 commented Mar 6, 2026 •

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lobin-z0x50 commented Mar 6, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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TODO

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lobin-z0x50 commented Mar 25, 2026

エビデンス

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lobin-z0x50 commented Mar 6, 2026 •

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