# CVE-2020-7464: Other in FreeBSD

> A programming error in the FreeBSD ure(4) driver allows attackers to inject packets across VLAN boundaries by exploiting incorrect packet length reporting.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Mar 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-m6mg-fqh8-x8m9

## What is CVE-2020-7464?

CVE-2020-7464 is a medium-severity vulnerability in Freebsd Freebsd, published on 26 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In FreeBSD 12.2-STABLE before r365730, 11.4-STABLE before r365738, 12.1-RELEASE before p10, 11.4-RELEASE before p4, and 11.3-RELEASE before p14, a programming error in the ure(4) device driver caused some Realtek USB Ethernet interfaces to incorrectly report packets with more than 2048 bytes in a single USB transfer as having a length of only 2048 bytes. An adversary can exploit this to cause the driver to misinterpret part of the payload of a large packet as a separate packet, and thereby inject packets across security boundaries such as VLANs.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2020-7464?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2020-7464?

No fix has been published for CVE-2020-7464 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7464 being exploited?

There is no known exploitation of CVE-2020-7464 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-2020-7464 and fix it if it is affected.

What it is: CVE-2020-7464 is a medium-severity vulnerability in Freebsd Freebsd, published on 26 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-7464 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-2020-7464/ (Markdown: https://insights.sbomify.com/CVE-2020-7464/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7464
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7464
- OSV: https://osv.dev/vulnerability/CVE-2020-7464

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-7464/
Summaries are generated and may contain mistakes; the official description above is the record.