Code reviews of the binjs_io crate // Lib.rs

RUSTSEC-2021-0085 (unsound) on 2021-01-03: 'Read' on uninitialized memory may cause UB

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation. The crate currently contains 4 occurrences of such cases.

Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

CVE-2021-45683

GHSA-c6px-4grw-hrjr

GHSA-cw4j-cf6c-mmfv

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To review the actual code of the crate, it's best to use cargo crev open binjs_io. Alternatively, you can download the tarball of binjs_io v0.2.1 or view the source online.