# CVE-2022-2502: Denial of service in RTU500 series

> An attacker can cause a denial of service by sending a crafted message to the RTU500, triggering a buffer overflow and reboot.

- **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:** 26 Jul 2023
- **Updated:** 5 Mar 2025
- **Also known as:** GHSA-45rh-q5fv-wf42

## What is CVE-2022-2502?

CVE-2022-2502 is a high-severity denial of service vulnerability in Hitachi Energy RTU500 series, published on 26 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability exists in the HCI IEC 60870-5-104 function included in certain versions of the RTU500 series product. The vulnerability can only be exploited, if the HCI 60870-5-104 is configured with support for IEC 62351-5 and the CMU contains the license feature ‘Advanced security’ which must be ordered separately. If these preconditions are fulfilled, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a missing input data validation which eventually if exploited causes an internal buffer to overflow in the HCI IEC 60870-5-104 function.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2022-2502?

It affects 1 product.


Products: Hitachienergy Rtu500 Firmware.

## How do I fix CVE-2022-2502?

No fix has been published for CVE-2022-2502 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-2502 being exploited?

There is no known exploitation of CVE-2022-2502 in the wild and no public exploit code.

## Other vulnerabilities in Hitachi Energy RTU500 series

- [CVE-2022-4608](https://insights.sbomify.com/CVE-2022-4608/): Memory corruption in RTU500 series (high 7.5)
- [CVE-2021-35533](https://insights.sbomify.com/CVE-2021-35533/): Specially Crafted IEC 60870-5-104 Packet Vulnerability in RTU500 series (high 7.5)
- [CVE-2023-6711](https://insights.sbomify.com/CVE-2023-6711/): Memory corruption in RTU500 series CMU Firmware (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-2502 and fix it if it is affected.

What it is: CVE-2022-2502 is a high-severity denial of service vulnerability in Hitachi Energy RTU500 series, published on 26 Jul 2023. 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-2022-2502 in the wild and no public exploit code.

Affected product: Hitachi Energy RTU500 series. 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-2022-2502/ (Markdown: https://insights.sbomify.com/CVE-2022-2502/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-2502
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-2502
- OSV: https://osv.dev/vulnerability/CVE-2022-2502

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-2502/
Summaries are generated and may contain mistakes; the official description above is the record.