# CVE-2020-27543: Denial of Service (DoS) in restify-paginate

> Remote attackers can crash Restify-based web services by omitting the HTTP Host header, causing a denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Feb 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-qr9h-vr5p-pwwx

## What is CVE-2020-27543?

CVE-2020-27543 is a high-severity denial of service vulnerability in n/a, published on 25 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The restify-paginate package 0.0.5 for Node.js allows remote attackers to cause a Denial-of-Service by omitting the HTTP Host header. A Restify-based web service would crash with an uncaught exception.

Weakness: CWE-755 (Improper Handling of Exceptional Conditions)

## Which versions are affected by CVE-2020-27543?

2 open source packages ship an affected version, including restify-paginate. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `restify-paginate` | npm | All versions to 0.0.5 | None |
| `restify-paginate` | npm | All versions to 0.0.5 | None |

Products: Restify-Paginate Project Restify-Paginate.

## How do I fix CVE-2020-27543?

No fix has been published for CVE-2020-27543 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-27543 being exploited?

There is no known exploitation of CVE-2020-27543 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-27543 and fix it if it is affected.

What it is: CVE-2020-27543 is a high-severity denial of service vulnerability in n/a, published on 25 Feb 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-2020-27543 in the wild and no public exploit code.

Affected packages and fixed versions:
- restify-paginate (npm): affected all versions up to 0.0.5; no fix listed
- restify-paginate (npm): affected all versions up to 0.0.5; 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/CVE-2020-27543/ (Markdown: https://insights.sbomify.com/CVE-2020-27543/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-27543
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-27543
- OSV: https://osv.dev/vulnerability/CVE-2020-27543

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-27543/
Summaries are generated and may contain mistakes; the official description above is the record.