# CVE-2022-33947: BIG-IP DNS TMUI Vulnerability CVE-2022-33947

> Authenticated operators can trigger Tomcat restarts and unauthorized DNS operations via deserialization flaws in the BIG-IP DNS TMUI.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Aug 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-phrv-v8gj-645h

## What is CVE-2022-33947?

CVE-2022-33947 is a medium-severity unsafe deserialization vulnerability in F5 Big-Ip Domain Name System, published on 4 Aug 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In BIG-IP Versions 16.1.x before 16.1.3, 15.1.x before 15.1.6.1, 14.1.x before 14.1.5, and all versions of 13.1.x, a vulnerability exists in undisclosed pages of the BIG-IP DNS Traffic Management User Interface (TMUI) that allows an authenticated attacker with at least operator role privileges to cause the Tomcat process to restart and perform unauthorized DNS requests and operations through undisclosed requests. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2022-33947?

It affects 1 product.


Products: F5 Big-Ip Domain Name System.

## How do I fix CVE-2022-33947?

No fix has been published for CVE-2022-33947 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-33947 being exploited?

There is no known exploitation of CVE-2022-33947 in the wild and no public exploit code.

## Other vulnerabilities in F5 Big-Ip Domain Name System

- [CVE-2022-23013](https://insights.sbomify.com/CVE-2022-23013/): Cross-site scripting in BIG-IP DNS & GTM (high 8.8)
- [CVE-2026-40061](https://insights.sbomify.com/CVE-2026-40061/): iControl REST and tmsh vulnerability (high 8.5)
- [CVE-2022-41787](https://insights.sbomify.com/CVE-2022-41787/): BIG-IP DNS Express vulnerability CVE-2022-41787 (high 7.5)
- [CVE-2021-23032](https://insights.sbomify.com/CVE-2021-23032/): Denial of service in BIG-IP DNS (high 7.5)
- [CVE-2020-27717](https://insights.sbomify.com/CVE-2020-27717/): Denial of service in BIG-IP DNS (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-33947 and fix it if it is affected.

What it is: CVE-2022-33947 is a medium-severity unsafe deserialization vulnerability in F5 Big-Ip Domain Name System, published on 4 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-2022-33947 in the wild and no public exploit code.

Affected product: F5 Big-Ip Domain Name System. 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-2022-33947/ (Markdown: https://insights.sbomify.com/CVE-2022-33947/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-33947
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-33947
- OSV: https://osv.dev/vulnerability/CVE-2022-33947

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-33947/
Summaries are generated and may contain mistakes; the official description above is the record.