# CVE-2022-29491: Null dereference in BIG-IP LTM, Advanced WAF, ASM, and APM

> Attackers can cause a denial of service by terminating the TMM process via specific requests on F5 BIG-IP devices with mixed protocol virtual servers.

- **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:** 5 May 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-55jm-h8m6-5gpq

## What is CVE-2022-29491?

CVE-2022-29491 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 5 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

On F5 BIG-IP LTM, Advanced WAF, ASM, or APM 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5, 14.1.x versions prior to 14.1.4.6, and all versions of 13.1.x, 12.1.x, and 11.6.x, when a virtual server is configured with HTTP, TCP on one side (client/server), and DTLS on the other (server/client), undisclosed requests can cause the TMM process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2022-29491?

It affects 4 products.


Products: F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Application Security Manager, F5 Big-Ip Local Traffic Manager.

## How do I fix CVE-2022-29491?

No fix has been published for CVE-2022-29491 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-29491 being exploited?

There is no known exploitation of CVE-2022-29491 in the wild and no public exploit code.

## Other vulnerabilities in F5 Big-Ip Access Policy Manager

- [CVE-2023-46747](https://insights.sbomify.com/CVE-2023-46747/): F5 BIG-IP Configuration Utility Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2022-1388](https://insights.sbomify.com/CVE-2022-1388/): F5 BIG-IP Missing Authentication (critical 9.8, exploited in the wild)
- [CVE-2021-22986](https://insights.sbomify.com/CVE-2021-22986/): F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2021-22991](https://insights.sbomify.com/CVE-2021-22991/): F5 BIG-IP Traffic Management Microkernel Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2020-5902](https://insights.sbomify.com/CVE-2020-5902/): F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-29491 and fix it if it is affected.

What it is: CVE-2022-29491 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 5 May 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-2022-29491 in the wild and no public exploit code.

Affected product: F5 Big-Ip Access Policy Manager. 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-2022-29491/ (Markdown: https://insights.sbomify.com/CVE-2022-29491/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-29491
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-29491
- OSV: https://osv.dev/vulnerability/CVE-2022-29491

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-29491/
Summaries are generated and may contain mistakes; the official description above is the record.