Reported

May 28, 2020

Issued

October 2, 2020 (last modified: October 19, 2021)

Package

internment (crates.io)

Type

Vulnerability

Categories

• memory-corruption

Aliases

• CVE-2020-35874

Details

https://github.com/droundy/internment/issues/11

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

Unaffected

• <0.3.12

Affected Functions

Version

internment::ArcIntern::drop

• >=0.3.12

Description

ArcIntern::drop has a race condition where it can release memory which is about to get another user. The new user will get a reference to freed memory.

This was fixed by serializing access to an interned object while it is being deallocated.

Versions prior to 0.3.12 used stronger locking which avoided the problem.