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fix(extensions): manifest id is not validated and is used as a path with recursive delete (path traversal)

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評估

難度
3/5
預估耗時
1-2 天
新手友好度
72/100
Issue 類型
缺陷
描述清晰度
描述清楚
活躍度
活躍
技術堆疊
dart, flutter
領域
desktop, security

研究方向

Read lib/core/extensions/models/extension_manifest.dart and the install paths in lib/core/extensions/local_extension_installer.dart; then inspect HttpMarketplaceRepository.install and uninstall for the corresponding path checks. Add the manifest ID validation and containment checks described in the issue, including the listed invalid IDs. Done means both installer paths reject traversal and the unit tests cover those IDs.

由索引模型根據 Issue 內容生成。

描述

bug core marketplace P1 stability

Problem

ExtensionManifest.fromJson reads the id as json['id'] as String with no validation (lib/core/extensions/models/extension_manifest.dart:114). The id is then used as a path segment:

  • LocalExtensionInstaller.installFromArchive: Directory(p.join(root.path, manifest.id)), and if it exists, extDir.delete(recursive: true) (lib/core/extensions/local_extension_installer.dart:123-128).
  • HttpMarketplaceRepository.install and uninstall(extensionId): p.join(dir.path, manifest.id) / p.join(dir.path, extensionId), delete(recursive: true) in uninstall.

A sideloaded .qext with "id": "../../some/dir" makes the installer recursively delete a directory outside the extensions folder (and write the extracted files there). isArchiveEntryNameSafe only checks entry names inside the archive, not the manifest id.

Expected

  • Validate the id in ExtensionManifest.fromJson (e.g. ^[A-Za-z0-9][A-Za-z0-9._-]*$, no separators, no ..) and reject the manifest otherwise.
  • After p.join, check isArchiveExtractPathWithinRoot(root, extDir.path) before delete / create, in both installers and in uninstall.
  • Unit tests: ids ../x, a/b, ..\x, absolute path, empty.
主要語言
Dart
星號
23
分支
1
平均合併
35 分鐘
30 天內合併 PR
497

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