The program must not modify data within the loaded image.

Note that there is no message to delete an address or modify data at a given address.

There are higher penalties - up to 10 years in prison - when the hacker also modifies data".

The code in that segment could then modify data maintained and used in the daemon.

Attacks that try to modify data in mutable storage are possible.

Hex editors directly modify the text or data of a file.

It is much more difficult to modify data in such a way that it appears to be valid to users.

Problem (user) programs could not modify data or program storage associated with the system state.

Validate: Check whether other transactions have modified data that this transaction has used (read or written).

It is also purportedly capable of modifying data on the computer, and can perform man-in-the-browser attacks.