Path Traversal In MeterSpere leads to upload file to any path

Summary

MeterSphere allow users to upload file, but not check the file name, may lead to upload file to any path if the file name in upload request is falsified.

Details

Metersphere's FileUtils.java didn't check the filePath.

    public static void createFile(String filePath, byte[] fileBytes) {
        File file = new File(filePath);
        if (file.exists()) {
            file.delete();
        }
        try {
            File dir = file.getParentFile();
            if (!dir.exists()) {
                dir.mkdirs();
            }
            file.createNewFile();
        } catch (Exception e) {
            LogUtil.error(e);
        }

        try (InputStream in = new ByteArrayInputStream(fileBytes); OutputStream out = new FileOutputStream(file)) {
            final int MAX = 4096;
            byte[] buf = new byte[MAX];
            for (int bytesRead = in.read(buf, 0, MAX); bytesRead != -1; bytesRead = in.read(buf, 0, MAX)) {
                out.write(buf, 0, bytesRead);
            }
        } catch (IOException e) {
            LogUtil.error(e);
            MSException.throwException(Translator.get("upload_fail"));
        }
    }

Patches

The vulnerability has been fixed in v2.5.1.

https://github.com/metersphere/metersphere/commit/3a890eeeb8a6b0887927c876a73bdb3a99a82138 : add validation for file name.

Workarounds

It is recommended to upgrade the version to v2.5.1.

For more information

If you have any questions or comments about this advisory, please open an issue.