This project might be open to known security vulnerabilities, which can be prevented by tightening the version range of affected dependencies. Find detailed information at the bottom.
Essentially, encoding a value larger than 4GiB can cause the length prefix in the protocol to overflow,
causing the server to interpret the rest of the string as binary protocol commands or other data.
This code has existed essentially since the beginning,
so it is reasonable to assume that all published versions <= 0.8.0 are affected.
Mitigation
As always, you should make sure your application is validating untrustworthy user input.
Reject any input over 4 GiB, or any input that could encode to a string longer than 4 GiB.
Dynamically built queries are also potentially problematic if it pushes the message size over this 4 GiB bound.
Encode::size_hint()
can be used for sanity checks, but do not assume that the size returned is accurate.
For example, the Json<T> and Text<T> adapters have no reasonable way to predict or estimate the final encoded size,
so they just return size_of::<T>() instead.
For web application backends, consider adding some middleware that limits the size of request bodies by default.
