# RUSTSEC-2020-0162: `tokio-proto` is deprecated/unmaintained

> The tokio-proto crate is deprecated and unmaintained, requiring users to migrate to tokio-tower to avoid supply chain risks.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not stated
- **Attackable:** Not stated
- **Victim action needed:** Not stated
- **Fix available:** No
- **Published:** 6 Feb 2020

## What is RUSTSEC-2020-0162?

RUSTSEC-2020-0162 is a vulnerability in tokio-proto, published on 6 Feb 2020. 

### Official description

The [`tokio-proto`](https://crates.io/crates/tokio-proto) crate has been deprecated, and [its GitHub repository](https://github.com/tokio-rs/tokio-proto) has been archived.
Users may be interested in [`tokio-tower`](https://crates.io/crates/tokio-tower) instead, per https://github.com/tokio-rs/tokio/issues/118#issuecomment-452969665

## Which versions are affected by RUSTSEC-2020-0162?

1 open source package ship an affected version, including tokio-proto.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `tokio-proto` | crates.io | From 0.0.0-0 | None |

## How do I fix RUSTSEC-2020-0162?

No fix has been published for RUSTSEC-2020-0162 yet. Limit exposure of the affected software until one is available.

## Is RUSTSEC-2020-0162 being exploited?

There is no known exploitation of RUSTSEC-2020-0162 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for RUSTSEC-2020-0162 and fix it if it is affected.

What it is: RUSTSEC-2020-0162 is a vulnerability in tokio-proto, published on 6 Feb 2020. 
Exploitation: There is no known exploitation of RUSTSEC-2020-0162 in the wild and no public exploit code.

Affected packages and fixed versions:
- tokio-proto (crates.io): affected from 0.0.0-0; no fix listed

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/RUSTSEC-2020-0162/ (Markdown: https://insights.sbomify.com/RUSTSEC-2020-0162/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/RUSTSEC-2020-0162

---
From sbomify Insights: https://insights.sbomify.com/RUSTSEC-2020-0162/
Summaries are generated and may contain mistakes; the official description above is the record.