Lenovo has patched software flaws in a file-sharing tool that could allow attackers to browse and make copies of files. The flaws were found by Core Security, which described a lengthy back-and-forth dialog with Lenovo over the problems. The affected application is SHAREit, which is designed to let people share files from Windows computers or Android devices over a local LAN or through a Wi-Fi hotspot. Lenovo has made several changes to the application, including a new “secure” mode.”]