# CVE-2022-0336: Missing authorization in Samba

> Attackers can bypass SPN checks to cause denial of service or impersonate services, compromising confidentiality and integrity in Samba AD DC.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 29 Aug 2022
- **Updated:** 2 Aug 2024
- **Also known as:** ALPINE-CVE-2022-0336, AZL-10741, AZL-37009, DEBIAN-CVE-2022-0336, ECHO-59df-2e7f-be70, GHSA-rg44-hwh5-vcpq, OESA-2022-1529, UBUNTU-CVE-2022-0336

## What is CVE-2022-0336?

CVE-2022-0336 is a high-severity missing authorization vulnerability in Fedoraproject Fedora, published on 29 Aug 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure that SPNs do not alias with those already in the database. Some of these checks are able to be bypassed if an account modification re-adds an SPN that was previously present on that account, such as one added when a computer is joined to a domain. An attacker who has the ability to write to an account can exploit this to perform a denial-of-service attack by adding an SPN that matches an existing service. Additionally, an attacker who can intercept traffic can impersonate existing services, resulting in a loss of confidentiality and integrity.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2022-0336?

It affects 2 products.


Products: Fedoraproject Fedora, Samba Samba.

## How do I fix CVE-2022-0336?

Apply the vendor's patch.

## Is CVE-2022-0336 being exploited?

There is no known exploitation of CVE-2022-0336 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-0336 and fix it if it is affected.

What it is: CVE-2022-0336 is a high-severity missing authorization vulnerability in Fedoraproject Fedora, published on 29 Aug 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-0336 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2022-0336/ (Markdown: https://insights.sbomify.com/CVE-2022-0336/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-0336
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-0336
- OSV: https://osv.dev/vulnerability/CVE-2022-0336

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-0336/
Summaries are generated and may contain mistakes; the official description above is the record.