Release 6.5.7

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Change Log
 
+## 6.5.7 - 2022-06-09
+
+* Fix failure to strip Authorization header on HTTP downgrade
+* Fix failure to strip the Cookie header on change in host or HTTP downgrade
+
 ## 6.5.6 - 2022-05-25
 
 * Fix cross-domain cookie leakage

src/RedirectMiddleware.php

@@ -141,7 +141,7 @@ function (ResponseInterface $response) use ($uri, $statusCode) {
     }
 
     /**
-     * Check for too many redirects
+     * Check for too many redirects.
      *
      * @return void
      *
@@ -190,7 +190,7 @@ public function modifyRequest(
             $modify['body'] = '';
         }
 
-        $uri = $this->redirectUri($request, $response, $protocols);
+        $uri = self::redirectUri($request, $response, $protocols);
         if (isset($options['idn_conversion']) && ($options['idn_conversion'] !== false)) {
             $idnOptions = ($options['idn_conversion'] === true) ? IDNA_DEFAULT : $options['idn_conversion'];
             $uri = Utils::idnUriConvert($uri, $idnOptions);
@@ -210,24 +210,50 @@ public function modifyRequest(
             $modify['remove_headers'][] = 'Referer';
         }
 
-        // Remove Authorization header if host is different.
-        if ($request->getUri()->getHost() !== $modify['uri']->getHost()) {
+        // Remove Authorization and Cookie headers if required.
+        if (self::shouldStripSensitiveHeaders($request->getUri(), $modify['uri'])) {
             $modify['remove_headers'][] = 'Authorization';
+            $modify['remove_headers'][] = 'Cookie';
         }
 
         return Psr7\modify_request($request, $modify);
     }
 
     /**
-     * Set the appropriate URL on the request based on the location header
+     * Determine if we should strip sensitive headers from the request.
+     *
+     * We return true if either of the following conditions are true:
+     *
+     * 1. the host is different;
+     * 2. the scheme has changed, and now is non-https.
+     *
+     * @return bool
+     */
+    private static function shouldStripSensitiveHeaders(
+        UriInterface $originalUri,
+        UriInterface $modifiedUri
+    ) {
+        if (strcasecmp($originalUri->getHost(), $modifiedUri->getHost()) !== 0) {
+            return true;
+        }
+
+        if ($originalUri->getScheme() !== $modifiedUri->getScheme() && 'https' !== $modifiedUri->getScheme()) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Set the appropriate URL on the request based on the location header.
      *
      * @param RequestInterface  $request
      * @param ResponseInterface $response
      * @param array             $protocols
      *
      * @return UriInterface
      */
-    private function redirectUri(
+    private static function redirectUri(
         RequestInterface $request,
         ResponseInterface $response,
         array $protocols

tests/RedirectMiddlewareTest.php

@@ -251,31 +251,36 @@ public function testInvokesOnRedirectForRedirects()
         self::assertTrue($call);
     }
 
-    public function testRemoveAuthorizationHeaderOnRedirect()
+    public function crossOriginRedirectProvider()
     {
-        $mock = new MockHandler([
-            new Response(302, ['Location' => 'http://test.com']),
-            function (RequestInterface $request) {
-                self::assertFalse($request->hasHeader('Authorization'));
-                return new Response(200);
-            }
-        ]);
-        $handler = HandlerStack::create($mock);
-        $client = new Client(['handler' => $handler]);
-        $client->get('http://example.com?a=b', ['auth' => ['testuser', 'testpass']]);
+        return [
+            ['http://example.com?a=b', 'http://test.com/', false],
+            ['https://example.com?a=b', 'https://test.com/', false],
+            ['http://example.com?a=b', 'https://test.com/', false],
+            ['https://example.com?a=b', 'http://test.com/', false],
+            ['http://example.com?a=b', 'http://example.com/', true],
+            ['https://example.com?a=b', 'https://example.com/', true],
+            ['http://example.com?a=b', 'https://example.com/', true],
+            ['https://example.com?a=b', 'http://example.com/', false],
+        ];
     }
 
-    public function testNotRemoveAuthorizationHeaderOnRedirect()
+    /**
+     * @dataProvider crossOriginRedirectProvider
+     */
+    public function testHeadersTreatmentOnRedirect($originalUri, $targetUri, $shouldBePresent)
     {
         $mock = new MockHandler([
-            new Response(302, ['Location' => 'http://example.com/2']),
-            function (RequestInterface $request) {
-                self::assertTrue($request->hasHeader('Authorization'));
+            new Response(302, ['Location' => $targetUri]),
+            function (RequestInterface $request) use ($shouldBePresent) {
+                self::assertSame($shouldBePresent, $request->hasHeader('Authorization'));
+                self::assertSame($shouldBePresent, $request->hasHeader('Cookie'));
+
                 return new Response(200);
             }
         ]);
         $handler = HandlerStack::create($mock);
         $client = new Client(['handler' => $handler]);
-        $client->get('http://example.com?a=b', ['auth' => ['testuser', 'testpass']]);
+        $client->get($originalUri, ['auth' => ['testuser', 'testpass'], 'headers' => ['Cookie' => 'foo=bar']]);
     }
 }