# CVE-2020-8485: ABB System 800xA Inter process communication vulnerability - 800xA for Mod 300

> An authenticated local attacker can inject data into inter-process communications to read/write controller data or crash processes in ABB System 800xA.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-86m2-v736-85f5

## What is CVE-2020-8485?

CVE-2020-8485 is a high-severity missing authorization vulnerability in ABB 800xA for MOD300, published on 29 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Insufficient protection of the inter-process communication functions in ABB System 800xA for MOD 300 (all published versions) enables an attacker authenticated on the local system to inject data, allowing reads and writes to the controllers or cause windows processes to crash.

Weakness: CWE-264

## Which versions are affected by CVE-2020-8485?

It affects 1 product.


Products: Abb 800xa.

## How do I fix CVE-2020-8485?

No fix has been published for CVE-2020-8485 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-8485 being exploited?

There is no known exploitation of CVE-2020-8485 in the wild and no public exploit code.

## Other vulnerabilities in ABB 800xA for MOD300

- [CVE-2020-8484](https://insights.sbomify.com/CVE-2020-8484/): ABB System 800xA Inter process communication vulnerability - 800xA for DCI (high 7.8)
- [CVE-2021-22277](https://insights.sbomify.com/CVE-2021-22277/): AC 800M MMS - Denial of Service vulnerability in MMS communication (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8485 and fix it if it is affected.

What it is: CVE-2020-8485 is a high-severity missing authorization vulnerability in ABB 800xA for MOD300, published on 29 Apr 2020. 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-2020-8485 in the wild and no public exploit code.

Affected product: ABB 800xA for MOD300. 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-2020-8485/ (Markdown: https://insights.sbomify.com/CVE-2020-8485/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8485
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8485
- OSV: https://osv.dev/vulnerability/CVE-2020-8485

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8485/
Summaries are generated and may contain mistakes; the official description above is the record.