advisory-db/crates/lexer/RUSTSEC-2020-0138.md

[advisory]
id = "RUSTSEC-2020-0138"
package = "lexer"
date = "2020-11-10"
url = "https://gitlab.com/nathanfaucett/rs-lexer/-/issues/2"
categories = ["memory-corruption", "thread-safety"]
aliases = ["CVE-2020-36458", "GHSA-f997-8gxg-r354"]
cvss = "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"

[versions]
patched = []

ReaderResult should be bounded by Sync

Affected versions of this crate implements Sync for ReaderResult<T, E> with the trait bound T: Send, E: Send.

Since matching on the public enum ReaderResult<T, E> provides access to &T & &E, allowing data race to a non-Sync type T or E. This can result in a memory corruption when multiple threads concurrently access &T or &E.

Suggested fix for the bug is change the trait bounds imposed on T & E to be T: Sync, E: Sync.