RUSTSEC-2020-0101

conquer-once's OnceCell lacks Send bound for its Sync trait.

Reported

December 22, 2020

Issued

January 20, 2021 (last modified: October 19, 2021)

Package

conquer-once (crates.io)

Type

Vulnerability

Categories

Keywords

#concurrency

Aliases

CVE-2020-36208

Details

https://github.com/oliver-giersch/conquer-once/issues/3

CVSS Score

7.8 HIGH

CVSS Details

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

CVSS Vector

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

Patched

>=0.3.2

Description

Affected versions of conquer-once implements Sync for its OnceCell type without restricting it to Sendable types.

This allows non-Send but Sync types such as MutexGuard to be sent across threads leading to undefined behavior and memory corruption in concurrent programs.

The issue was fixed by adding a Send constraint to OnceCell.