Reported

December 10, 2020

Issued

March 26, 2021 (last modified: June 13, 2023)

Package

cgc (crates.io)

Type

Vulnerability

Categories

• memory-corruption

Keywords

#memory-safety #aliasing #concurrency

Aliases

• CVE-2020-36466
• CVE-2020-36467
• CVE-2020-36468
• GHSA-f3mq-99jr-ww4r
• GHSA-f9xr-3m55-5q2v
• GHSA-pwhf-7427-9vv2

References

• https://github.com/playXE/cgc/issues/5

CVSS Score

5.9 MEDIUM

CVSS Details

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS Vector

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

Patched

no patched versions

Description

Affected versions of this crate have the following issues:

1. Ptr implements Send and Sync for all types, this can lead to data races by sending non-thread safe types across threads.

2. Ptr::get violates mutable alias rules by returning multiple mutable references to the same object.

3. Ptr::write uses non-atomic writes to the underlying pointer. This means that when used across threads it can lead to data races.

Advisory available under CC0-1.0 license.