# CVE-2022-22278: Denial of service in SonicOS

> An attacker can cause a Denial of Service by triggering large HTTP responses from the SonicOS Content Filtering 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:** 27 Apr 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-fpfj-wp86-qmrq

## What is CVE-2022-22278?

CVE-2022-22278 is a high-severity denial of service vulnerability in SonicWall SonicOS, published on 27 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in SonicOS CFS (Content filtering service) returns a large 403 forbidden HTTP response message to the source address when users try to access prohibited resource this allows an attacker to cause HTTP Denial of Service (DoS) attack

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2022-22278?

It affects 49 products.


Products: Sonicwall Nsa 2650 Firmware, Sonicwall Nsa 2700 Firmware, Sonicwall Nsa 3650 Firmware, Sonicwall Nsa 3700 Firmware, Sonicwall Nsa 4650 Firmware, Sonicwall Nsa 4700 Firmware, Sonicwall Nsa 5650 Firmware, Sonicwall Nsa 5700 Firmware, Sonicwall Nsa 6650 Firmware, Sonicwall Nsa 6700 Firmware, Sonicwall Nsa 9250 Firmware, Sonicwall Nsa 9450 Firmware, Sonicwall Nsa 9650 Firmware, Sonicwall Nssp 10700 Firmware, Sonicwall Nssp 11700 Firmware, Sonicwall Nssp 12400 Firmware, Sonicwall Nssp 12800 Firmware, Sonicwall Nssp 13700 Firmware, Sonicwall Nssp 15700 Firmware, Sonicwall Nsv 100 Firmware and 29 more.

## How do I fix CVE-2022-22278?

No fix has been published for CVE-2022-22278 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-22278 being exploited?

There is no known exploitation of CVE-2022-22278 in the wild and no public exploit code.

## Other vulnerabilities in SonicWall SonicOS

- [CVE-2022-22276](https://insights.sbomify.com/CVE-2022-22276/): Information disclosure in SonicOS (medium 5.3)
- [CVE-2022-22277](https://insights.sbomify.com/CVE-2022-22277/): Information disclosure in SonicOS (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-22278 and fix it if it is affected.

What it is: CVE-2022-22278 is a high-severity denial of service vulnerability in SonicWall SonicOS, published on 27 Apr 2022. 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-2022-22278 in the wild and no public exploit code.

Affected product: SonicWall SonicOS. 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-2022-22278/ (Markdown: https://insights.sbomify.com/CVE-2022-22278/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-22278
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-22278
- OSV: https://osv.dev/vulnerability/CVE-2022-22278

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-22278/
Summaries are generated and may contain mistakes; the official description above is the record.