RUSTSEC-2019-0028

Unsound impl Follow for bool

Reported

October 20, 2019

Issued

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

Package

flatbuffers (crates.io)

Type

Vulnerability

Aliases

CVE-2019-25004

Details

https://github.com/google/flatbuffers/issues/5530

CVSS Score

9.8 CRITICAL

CVSS Details

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

CVSS Vector

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

Patched

>=0.6.1

Unaffected

<0.4.0

Affected Functions

Version

flatbuffers::Follow::follow

>=0.4.0
<=0.6.0

Description

The implementation of impl Follow for bool allows to reinterpret arbitrary bytes as a bool.

In Rust bool has stringent requirements for its in-memory representation. Use of this function allows to violate these requirements and invoke undefined behaviour in safe code.