Unsound casting in flatbuffers · CVE-2019-25004 · GitHub Advisory Database · GitHub

Unsound casting in flatbuffers

Critical severity GitHub Reviewed Published Aug 25, 2021 to the GitHub Advisory Database • Updated Jun 13, 2023

Package

flatbuffers (Rust)

Affected versions

>= 0.4.0, < 0.6.1

Patched versions

0.6.1

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.

References

Reviewed Aug 19, 2021

Published to the GitHub Advisory Database Aug 25, 2021

Last updated Jun 13, 2023

Severity

Critical

9.8

/ 10

CVSS base metrics

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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