# CVE-2020-24679: Denial of Service attack on Symphony Plus

> Attackers can crash the service or execute arbitrary code via crafted messages, impacting industrial control system availability and integrity.

- **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:** 22 Dec 2020
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-j5q4-h79w-mh86

## What is CVE-2020-24679?

CVE-2020-24679 is a high-severity denial of service vulnerability in ABB Ability™ Symphony® Plus Historian, published on 22 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A S+ Operations and S+ Historian service is subject to a DoS by special crafted messages. An attacker might use this flaw to make it crash or even execute arbitrary code on the machine where the service is hosted.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2020-24679?

It affects 2 products.


Products: Abb Symphony \+ Historian, Abb Symphony \+ Operations.

## How do I fix CVE-2020-24679?

No fix has been published for CVE-2020-24679 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-24679 being exploited?

There is no known exploitation of CVE-2020-24679 in the wild and no public exploit code.

## Other vulnerabilities in ABB Ability™ Symphony® Plus Historian

- [CVE-2020-24673](https://insights.sbomify.com/CVE-2020-24673/): SQL Injection in Symphony Plus (critical 9.8)
- [CVE-2020-24675](https://insights.sbomify.com/CVE-2020-24675/): Weak Authentication in Symphony Plus (critical 9.8)
- [CVE-2020-24683](https://insights.sbomify.com/CVE-2020-24683/): Authentication Bypass in Symphony Plus (critical 9.8)
- [CVE-2020-24674](https://insights.sbomify.com/CVE-2020-24674/): Improper Authorization in Symphony Plus (high 8.8)
- [CVE-2020-24677](https://insights.sbomify.com/CVE-2020-24677/): Insecure Web Service in Symphony Plus (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-24679 and fix it if it is affected.

What it is: CVE-2020-24679 is a high-severity denial of service vulnerability in ABB Ability™ Symphony® Plus Historian, published on 22 Dec 2020. 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-2020-24679 in the wild and no public exploit code.

Affected product: ABB Ability™ Symphony® Plus Historian. 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-2020-24679/ (Markdown: https://insights.sbomify.com/CVE-2020-24679/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-24679
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-24679
- OSV: https://osv.dev/vulnerability/CVE-2020-24679

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-24679/
Summaries are generated and may contain mistakes; the official description above is the record.