[buffoon] Use of Uninitialized Resource in buffoon.

An issue was discovered in the buffoon crate through 2020-12-31 for Rust. InputStream::read_exact may read from uninitialized memory locations.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-36512
• https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/buffoon/RUSTSEC-2020-0154.md
• https://rustsec.org/advisories/RUSTSEC-2020-0154.html
• https://github.com/advisories/GHSA-v938-qcc9-rwv8