diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
index 5126d27afa..c7086f72c4 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
@@ -52,6 +52,10 @@ class Configuration implements ConfigurationInterface
                                 }
 
                                 if (false !== strpos($v, '/')) {
+                                    if ('0.0.0.0/0' === $v) {
+                                        return false;
+                                    }
+
                                     list($v, $mask) = explode('/', $v, 2);
 
                                     if (strcmp($mask, (int) $mask) || $mask < 1 || $mask > (false !== strpos($v, ':') ? 128 : 32)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
index fba0fb2ab3..61eea7a0d0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -66,6 +66,7 @@ class ConfigurationTest extends \PHPUnit_Framework_TestCase
             array(array(), array()),
             array(array('10.0.0.0/8'), array('10.0.0.0/8')),
             array(array('::ffff:0:0/96'), array('::ffff:0:0/96')),
+            array(array('0.0.0.0/0'), array('0.0.0.0/0')),
         );
     }