RUSTSEC-2020-0119

ReadTicket and WriteTicket should only be sendable when T is Send

Reported

November 17, 2020

Issued

January 25, 2021 (last modified: October 19, 2021)

Package

ticketed_lock (crates.io)

Type

Vulnerability

Categories

Aliases

CVE-2020-36439

Details

https://github.com/kvark/ticketed_lock/issues/7

CVSS Score

8.1 HIGH

CVSS Details

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Patched

>=0.3.0

Description

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>.