Reported

November 17, 2020

Issued

December 7, 2020 (last modified: October 19, 2021)

Package

try-mutex (crates.io)

Type

Vulnerability

Categories

• thread-safety

Aliases

• CVE-2020-35924

Details

https://github.com/mpdn/try-mutex/issues/2

CVSS Score

5.5 MEDIUM

CVSS Details

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS Vector

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

Patched

• >=0.3.0

Description

Affected versions of this crate unconditionally implemented Sync trait for TryMutex<T> type.

This allows users to put non-Send T type in TryMutex and send it to another thread, which can cause a data race.

The flaw was corrected in the 0.3.0 release by adding T: Send bound for the Sync trait implementation.