advisory-db/crates/bunch/RUSTSEC-2020-0130.md

[advisory]
id = "RUSTSEC-2020-0130"
package = "bunch"
date = "2020-11-12"
url = "https://github.com/krl/bunch/issues/1"
categories = ["memory-corruption", "thread-safety"]
aliases = ["CVE-2020-36450", "GHSA-jwph-qp5h-f9wj"]
cvss = "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"

[versions]
patched = []

Bunch unconditionally implements Send/Sync

Affected versions of this crate unconditionally implements Send/Sync for Bunch<T>. This allows users to insert T: !Sync to Bunch<T>. It is possible to create a data race to a T: !Sync by invoking the Bunch::get() API (which returns &T) from multiple threads. It is also possible to send T: !Send to other threads by inserting T inside Bunch<T> and sending Bunch<T> to another thread, allowing to create a data race by inserting types like T = Rc<_>.

Such data races can lead to memory corruption.