advisory-db/crates/ticketed_lock/RUSTSEC-2020-0119.md

[advisory]
id = "RUSTSEC-2020-0119"
package = "ticketed_lock"
date = "2020-11-17"
url = "https://github.com/kvark/ticketed_lock/issues/7"
categories = ["memory-corruption", "thread-safety"]
aliases = ["CVE-2020-36439", "GHSA-77m6-x95j-75r5", "GHSA-gq4h-f254-7cw9"]
cvss = "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"

[versions]
patched = [">= 0.3.0"]

ReadTicket and WriteTicket should only be sendable when T is Send

Affected versions of this crate unconditionally implemented Send for ReadTicket<T> & WriteTicket<T>. This allows to send non-Send T to other threads.

This can allows creating data races by cloning types with internal mutability and sending them to other threads (as T of ReadTicket<T>/WriteTicket<T>). Such data races can cause memory corruption or other undefined behavior.

The flaw was corrected in commit a986a93 by adding T: Send bounds to Send impls of ReadTicket<T>/WriteTicket<T>.