RUSTSEC-2020-0009

Dashboard / Vulnerabilities / RUSTSEC-2020-0009

RUSTSEC-2020-0009

Summary: `read_scalar` and `read_scalar_at` allow transmuting values without `unsafe` blocks

Details: The `read_scalar` and `read_scalar_at` functions are unsound because they allow transmuting values without `unsafe` blocks. The following example shows how to create a dangling reference: ``` fn main() { #[derive(Copy, Clone, PartialEq, Debug)] struct S(&'static str); impl flatbuffers::EndianScalar for S { fn to_little_endian(self) -> Self { self } fn from_little_endian(self) -> Self { self } } println!("{:?}", flatbuffers::read_scalar::<S>(&[1; std::mem::size_of::<S>()])); } ```

References: https://crates.io/crates/flatbuffers, https://rustsec.org/advisories/RUSTSEC-2020-0009.html, https://github.com/google/flatbuffers/issues/5825