# CVE-2022-43953: Code injection in FortiOS

> Attackers can execute unauthorized code or commands on Fortinet FortiOS and FortiProxy devices via crafted format string inputs.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Jun 2023
- **Updated:** 23 Oct 2024
- **Also known as:** GHSA-vv6m-9gcj-8cf5

## What is CVE-2022-43953?

CVE-2022-43953 is a medium-severity code injection vulnerability in Fortinet Fortios, published on 13 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A use of externally-controlled format string in Fortinet FortiOS version 7.2.0 through 7.2.4, FortiOS all versions 7.0, FortiOS all versions 6.4, FortiOS all versions 6.2, FortiProxy version 7.2.0 through 7.2.1, FortiProxy version 7.0.0 through 7.0.7 allows attacker to execute unauthorized code or commands via specially crafted commands.

Weakness: CWE-134 (Use of Externally-Controlled Format String)

## Which versions are affected by CVE-2022-43953?

It affects 2 products.


Products: Fortinet Fortios, Fortinet Fortiproxy.

## How do I fix CVE-2022-43953?

No fix has been published for CVE-2022-43953 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-43953 being exploited?

There is no known exploitation of CVE-2022-43953 in the wild and no public exploit code.

## Other vulnerabilities in Fortinet Fortios

- [CVE-2024-23113](https://insights.sbomify.com/CVE-2024-23113/): Fortinet Multiple Products Format String (critical 9.8, exploited in the wild)
- [CVE-2022-40684](https://insights.sbomify.com/CVE-2022-40684/): Fortinet Multiple Products Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2024-55591](https://insights.sbomify.com/CVE-2024-55591/): Fortinet FortiOS and FortiProxy Authentication Bypass (critical 9.6, exploited in the wild)
- [CVE-2024-21762](https://insights.sbomify.com/CVE-2024-21762/): Fortinet FortiOS Out-of-Bound Write (critical 9.6, exploited in the wild)
- [CVE-2022-42475](https://insights.sbomify.com/CVE-2022-42475/): Fortinet FortiOS Heap-Based Buffer Overflow (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-43953 and fix it if it is affected.

What it is: CVE-2022-43953 is a medium-severity code injection vulnerability in Fortinet Fortios, published on 13 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-43953 in the wild and no public exploit code.

Affected product: Fortinet Fortios. 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-2022-43953/ (Markdown: https://insights.sbomify.com/CVE-2022-43953/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-43953
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-43953
- OSV: https://osv.dev/vulnerability/CVE-2022-43953

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-43953/
Summaries are generated and may contain mistakes; the official description above is the record.