We will start by checking the shouldAcceptNewConnection: method. We will concentrate on the OneDriveUpdaterDaemon binary, although OneDriveStandaloneUpdaterDaemon should be the same. These service binaries are located inside the main application’s bundle, at /Applications/OneDrive.app/Contents/OneDriveUpdaterDaemon.xpc/Contents/MacOS/OneDriveUpdaterDaemon and /Applications/OneDrive.app/Contents/StandaloneUpdaterDaemon.xpc/Contents/MacOS/StandaloneUpdaterDaemon. Both services contain the same methods and therefore the same vulnerability. OneDrive installs two Mach services, and that are defined in the PLIST files located under /Library/LaunchDaemons/. Know that your files are safe with advanced security features that protect what’s important. Easily share documents, photos, and other files with friends, family, and colleagues. This helper can be replaced with a custom binary resulting in root-level execution controlled by low-priv users. Microsoft OneDrive keeps your files and photos backed up, protected, synced, and accessible on your Mac and across all your other devices. This allows us to overwrite an existing OneDrive.app, and give world write permission to all files and directories, including the root-invoked helper. Although its signature is properly verified and can’t be bypassed, it retains the file permission of the new OneDrive.app. Additionally, the XPC Daemon allows the installation of a new OneDrive.app. The XPC Daemon uses the process ID (PID) to verify the client, which results in an insecure client verification. It gives you free online storage for all your personal files so you can get to them. The vulnerability in question stems from a combination of two issues. OneDrive is the one place for everything in your work and personal life. A CVE was not assigned to this vulnerability. W e have been working closely with Apple to ensure we ’ re providing a great user experience in OneDrive on Apple products, whether people are using OneDrive to keep their work files synced and protected or to store and share their personal files and photos in the cloud. Store and share your notebooks on OneDrive with your free Microsoft account. It took Microsoft over a year to fix the vulnerability and the patched version of OneDrive was released in 2021 December. Works on Windows, macOS, iOS, Android, and in your favorite browser. iPad, and Mac when you use OneDrive, Google Drive, and other cloud storage software. Although Microsoft secured these services reasonably well, we will see how small mistakes in the code can have serious impacts. As a regular user of OneDrive on Mac, you might meet the Couldnt. In this blog post, we will share the details of a vulnerability Offensive Security discovered in the XPC service of Microsoft OneDrive. Security Operations for Beginners (SOC-100).
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