CVE-2023-23931

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In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.", "A vulnerability was found in python-cryptography. In affected versions, `Cipher.update_into` would accept Python objects which implement the buffer protocol but provide only immutable buffers. 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