updated changelog header to security

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Security
-- Code injection vulnerability by using illegal function names in `{function name='blah'}{/function}` 
+- Prevent access to `$smarty.template_object` in Security mode
 
 ## [3.1.38] - 2021-01-08
 

libs/sysplugins/smarty_internal_compile_function.php

@@ -58,11 +58,6 @@ class Smarty_Internal_Compile_Function extends Smarty_Internal_CompileBase
         }
         unset($_attr[ 'nocache' ]);
         $_name = trim($_attr[ 'name' ], '\'"');
-
-        if (!preg_match('/^[a-zA-Z0-9_\x80-\xff]+$/', $_name)) {
-	        $compiler->trigger_template_error("Function name contains invalid characters: {$_name}", null, true);
-        }
-
         $compiler->parent_compiler->tpl_function[ $_name ] = array();
         $save = array(
             $_attr, $compiler->parser->current_buffer, $compiler->template->compiled->has_nocache_code,

libs/sysplugins/smarty_internal_compile_private_special_variable.php

@@ -81,6 +81,10 @@ class Smarty_Internal_Compile_Private_Special_Variable extends Smarty_Internal_C
                 case 'template':
                     return 'basename($_smarty_tpl->source->filepath)';
                 case 'template_object':
+                    if (isset($compiler->smarty->security_policy)) {
+                        $compiler->trigger_template_error("(secure mode) template_object not permitted");
+                        break;
+                    }
                     return '$_smarty_tpl';
                 case 'current_dir':
                     return 'dirname($_smarty_tpl->source->filepath)';

tests/UnitTests/SecurityTests/SecurityTest.php

@@ -382,6 +382,15 @@ class SecurityTest extends PHPUnit_Smarty
         $this->smarty->security_policy->trusted_uri = array();
         $this->assertContains('<title>Preface | Smarty</title>', $this->smarty->fetch('string:{fetch file="https://www.smarty.net/docs/en/preface.tpl"}'));
     }
+
+    /**
+     * In security mode, accessing $smarty.template_object should be illegal.
+     * @expectedException SmartyCompilerException
+     */
+    public function testSmartyTemplateObject() {
+        $this->smarty->display('string:{$smarty.template_object}');
+    }
+
 }
 
 class mysecuritystaticclass

tests/UnitTests/TemplateSource/TagTests/TemplateFunction/CompileFunctionTest.php

@@ -431,14 +431,5 @@ class CompileFunctionTest extends PHPUnit_Smarty
                      array("{function name=simple}A{\$foo}\nC{/function}{call name='simple'}", "Abar\nC", 'T14', $i++),
                      array("{function name=simple}A\n{\$foo}\nC{/function}{call name='simple'}", "A\nbar\nC", 'T15', $i++),
         );
-    }
-
-    /**
-     * Test handling of function names that are a security risk
-     * @expectedException        SmartyCompilerException
-     */
-    public function testIllegalFunctionName() {
-	    $this->smarty->fetch('string:{function name=\'rce(){};echo "hi";function \'}{/function}');
-    }
-
+            }
 }