# CVE-2020-12514: Pepper+Fuchs Comtrol IO-Link Master NULL Pointer Dereference

> Attackers can cause a denial of service in the discoveryd service of Pepperl+Fuchs Comtrol IO-Link Masters via a NULL pointer dereference.

- **Severity:** Medium 6.6 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jan 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-pvhr-37pj-qc85

## What is CVE-2020-12514?

CVE-2020-12514 is a medium-severity vulnerability in Pepper+Fuchs Comtrol IO-Link Master, published on 22 Jan 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to a NULL Pointer Dereference that leads to a DoS in discoveryd

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2020-12514?

It affects 12 products.


Products: Pepperl-Fuchs Io-Link Master 4-Eip Firmware, Pepperl-Fuchs Io-Link Master 4-Pnio Firmware, Pepperl-Fuchs Io-Link Master 8-Eip-L Firmware, Pepperl-Fuchs Io-Link Master 8-Eip Firmware, Pepperl-Fuchs Io-Link Master 8-Pnio-L Firmware, Pepperl-Fuchs Io-Link Master 8-Pnio Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Eip-P Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Eip-T Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Eip Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Pnio-P Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Pnio-T Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Pnio Firmware.

## How do I fix CVE-2020-12514?

No fix has been published for CVE-2020-12514 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-12514 being exploited?

There is no known exploitation of CVE-2020-12514 in the wild and no public exploit code.

## Other vulnerabilities in Pepper+Fuchs Comtrol IO-Link Master

- [CVE-2020-12511](https://insights.sbomify.com/CVE-2020-12511/): Pepper+Fuchs Comtrol IO-Link Master Cross-Site Request Forgery (high 8.8)
- [CVE-2020-12512](https://insights.sbomify.com/CVE-2020-12512/): Pepper+Fuchs Comtrol IO-Link Master Cross-Site Scripting (high 7.5)
- [CVE-2020-12513](https://insights.sbomify.com/CVE-2020-12513/): Pepper+Fuchs Comtrol IO-Link Master OS Command Injection (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-12514 and fix it if it is affected.

What it is: CVE-2020-12514 is a medium-severity vulnerability in Pepper+Fuchs Comtrol IO-Link Master, published on 22 Jan 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-12514 in the wild and no public exploit code.

Affected product: Pepper+Fuchs Comtrol IO-Link Master. 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-2020-12514/ (Markdown: https://insights.sbomify.com/CVE-2020-12514/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-12514
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-12514
- OSV: https://osv.dev/vulnerability/CVE-2020-12514

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-12514/
Summaries are generated and may contain mistakes; the official description above is the record.