The vulnerable code is used only on newer x86_64 processors supporting the AVX512-IFMA instructions. Before returning to the caller all the XMM registers are set to zero rather than restoring their previous content. The POLY1305 MAC (message authentication code) implementation in OpenSSL does not save the contents of non-volatile XMM registers on Windows 64 platform when calculating the MAC of data larger than 64 bytes. Impact summary: If in an application that uses the OpenSSL library an attacker can influence whether the POLY1305 MAC algorithm is used, the application state might be corrupted with various application dependent consequences. It does support exporting the scanned PDFs to Google Drive, though, so you can use it in conjunction with Google's text recognition instead.Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that might corrupt the internal state of applications on the Windows 64 platform when running on newer X86_64 processors supporting the AVX512-IFMA instructions. It works well as a traditional OCR app with printed text but struggles with anything but the clearest handwriting. In our tests, the results were very mixed. You can now open any writing app-a notes app, Google Docs, a text message-and paste it in. The app will take a few seconds to try and decipher what you've written, then select Copy Text to copy it to your clipboard. Open the image by tapping the thumbnail in the bottom right corner, then select the Recognizing Text button in the top right. You can also use it with images already in your phone's gallery if you want. To use it, tap the Camera icon, select Document (or you can try Whiteboard to see if that gives better results), and then line up and shoot the page you want to scan. Another of the big tech giants, Adobe, has a scanning app that can work with handwriting.
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