N°8017 - Security - dependabot - Symfony's VarDumper vulnerable to unsafe deserialization

Author: bdalsass

lib/composer/InstalledVersions.php

@@ -26,6 +26,12 @@
  */
 class InstalledVersions
 {
+    /**
+     * @var string|null if set (by reflection by Composer), this should be set to the path where this class is being copied to
+     * @internal
+     */
+    private static $selfDir = null;
+
     /**
      * @var mixed[]|null
      * @psalm-var array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}|array{}|null
@@ -322,6 +328,18 @@ public static function reload($data)
         self::$installedIsLocalDir = false;
     }
 
+    /**
+     * @return string
+     */
+    private static function getSelfDir()
+    {
+        if (self::$selfDir === null) {
+            self::$selfDir = strtr(__DIR__, '\\', '/');
+        }
+
+        return self::$selfDir;
+    }
+
     /**
      * @return array[]
      * @psalm-return list<array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}>
@@ -336,7 +354,7 @@ private static function getInstalled()
         $copiedLocalDir = false;
 
         if (self::$canGetVendors) {
-            $selfDir = strtr(__DIR__, '\\', '/');
+            $selfDir = self::getSelfDir();
             foreach (ClassLoader::getRegisteredLoaders() as $vendorDir => $loader) {
                 $vendorDir = strtr($vendorDir, '\\', '/');
                 if (isset(self::$installedByVendor[$vendorDir])) {