# CVE-2020-7456: Memory corruption in FreeBSD

> An attacker with physical access can execute arbitrary code via a crafted USB device due to improper memory handling in the HID subsystem.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-g86x-jhxw-c6c2

## What is CVE-2020-7456?

CVE-2020-7456 is a medium-severity memory corruption vulnerability in Freebsd Freebsd, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In FreeBSD 12.1-STABLE before r361918, 12.1-RELEASE before p6, 11.4-STABLE before r361919, 11.3-RELEASE before p10, and 11.4-RC2 before p1, an invalid memory location may be used for HID items if the push/pop level is not restored within the processing of that HID item allowing an attacker with physical access to a USB port to be able to use a specially crafted USB device to gain kernel or user-space code execution.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2020-7456?

It affects 2 products.


Products: Freebsd Freebsd, Netapp Clustered Data Ontap.

## How do I fix CVE-2020-7456?

No fix has been published for CVE-2020-7456 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7456 being exploited?

There is no known exploitation of CVE-2020-7456 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7456 and fix it if it is affected.

What it is: CVE-2020-7456 is a medium-severity memory corruption vulnerability in Freebsd Freebsd, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-7456 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-7456/ (Markdown: https://insights.sbomify.com/CVE-2020-7456/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7456
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7456
- OSV: https://osv.dev/vulnerability/CVE-2020-7456

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-7456/
Summaries are generated and may contain mistakes; the official description above is the record.