Reported

November 10, 2020

Issued

January 20, 2021 (last modified: June 13, 2023)

Package

hashconsing (crates.io)

Type

Vulnerability

Categories

• memory-corruption
• thread-safety

Keywords

#concurrency

Aliases

• CVE-2020-36215
• GHSA-rw2c-c256-3r53

References

• https://github.com/AdrienChampion/hashconsing/issues/1

CVSS Score

7.5 HIGH

CVSS Details

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS Vector

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

Patched

• >=1.1.0

Description

Affected versions of hashconsing implements Send/Sync for its HConsed type without restricting it to Sendable types and Syncable types.

This allows non-Sync types such as Cell to be shared across threads leading to undefined behavior and memory corruption in concurrent programs.

Advisory available under CC0-1.0 license.