RUSTSEC-2020-0127

SyncRef's clone() and debug() allow data races

Reported

December 18, 2020

Issued

January 30, 2021 (last modified: June 13, 2023)

Package

v9 (crates.io)

Type

Vulnerability

Categories

Aliases

References

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

>=0.1.43

Description

Affected versions of this crate unconditionally implement Sync for SyncRef<T>. This definition allows data races if &T is accessible through &SyncRef.

SyncRef<T> derives Clone and Debug, and the default implementations of those traits access &T by invoking T::clone() & T::fmt(). It is possible to create data races & undefined behavior by concurrently invoking SyncRef<T>::clone() or SyncRef<T>::fmt() from multiple threads with T: !Sync.

Advisory available under CC0-1.0 license.