# CVE-2019-25004: RUSTSEC-2019-0028 - Unsound `impl Follow for bool`

Source: https://junglewise.ai/threats/cve-2019-25004-unsound-casting-in-flatbuffers  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-10-20  
License: CC BY 4.0 with a link back

CVE-2019-25004 · Severity: low · CVSS 3.1 · Published 2019-10-20

Unsound `impl Follow for bool`

Technologies: [flatbuffers (crates.io)](https://junglewise.ai/threats/technologies/flatbuffers). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io).

## Quick answers

**Is CVE-2019-25004 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-25004 being exploited in the wild.

**How severe is CVE-2019-25004?** Low severity, with a CVSS score of 3.1, published 20 October 2019.

**Which products and versions are affected?** flatbuffers (crates.io) SEMVER:introduced=0.4.0,fixed=0.6.1.

**Is there a fix for CVE-2019-25004?** Yes. flatbuffers (crates.io): upgrade to 0.6.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-25004?** Check whether you run flatbuffers (crates.io) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- flatbuffers (crates.io): upgrade to 0.6.1 or later

  ```sh
  cargo update -p flatbuffers
  ```


## Affected products

- flatbuffers (crates.io) SEMVER:introduced=0.4.0,fixed=0.6.1

## Identifiers

- CVE-2019-25004
- GHSA-gx73-2498-r55c
- RUSTSEC-2019-0028

## Related threats

- [Generated code can read and write out of bounds in safe code](https://junglewise.ai/threats/generated-code-can-read-and-write-out-of-bounds-in-safe-code-d3529e25)
- [RUSTSEC-2021-0122 - Generated code can read and write out of bounds in safe code](https://junglewise.ai/threats/rustsec-2021-0122-generated-code-can-read-and-write-out-of-bounds-in-5454d397)
- [RUSTSEC-2020-0009 - `read_scalar` and `read_scalar_at` allow transmuting values without `unsafe` blocks](https://junglewise.ai/threats/cve-2020-35864-dangling-reference-in-flatbuffers)