Reported

November 24, 2020

Issued

January 24, 2021 (last modified: June 13, 2023)

Package

conqueue (crates.io)

Type

Vulnerability

Categories

• memory-corruption
• thread-safety

Aliases

• CVE-2020-36437
• GHSA-368f-29c3-4f2r

References

• https://github.com/longshorej/conqueue/issues/9

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

• >=0.4.0

Description

Affected versions of this crate unconditionally implemented Send/Sync for QueueSender<T>, allowing to send non-Send T to other threads by invoking (&QueueSender<T>).send().

This fails to prevent users from creating data races by sending types like Rc<T> or Arc<Cell<T>> to other threads, which can lead to memory corruption.

The flaw was corrected in commit 1e462c3 by imposing T: Send to both Send/Sync impls for QueueSender<T>/QueueReceiver<T>.

Advisory available under CC0-1.0 license.