# CVE-2019-6557: Memory corruption in Moxa IKS, EDS

> Buffer overflows in Moxa IKS and EDS devices allow remote attackers to execute arbitrary code.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 5 Mar 2019
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-cgrr-xgfh-rgv2

## What is CVE-2019-6557?

CVE-2019-6557 is a critical memory corruption vulnerability in ICS-CERT Moxa IKS, EDS, published on 5 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Several buffer overflow vulnerabilities have been identified in Moxa IKS and EDS, which may allow remote code execution.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2019-6557?

It affects 4 products.


Products: Moxa Eds-405a Firmware, Moxa Eds-408a Firmware, Moxa Eds-510a Firmware, Moxa Iks-G6824a Firmware.

## How do I fix CVE-2019-6557?

No fix has been published for CVE-2019-6557 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-6557 being exploited?

There is no known exploitation of CVE-2019-6557 in the wild and no public exploit code.

## Other vulnerabilities in ICS-CERT Moxa IKS, EDS

- [CVE-2019-6526](https://insights.sbomify.com/CVE-2019-6526/): Information disclosure in IKS, EDS (critical 9.8)
- [CVE-2019-6524](https://insights.sbomify.com/CVE-2019-6524/): Auth bypass in Moxa IKS, EDS (critical 9.8)
- [CVE-2019-6563](https://insights.sbomify.com/CVE-2019-6563/): Weak cryptography in Moxa IKS, EDS (critical 9.8)
- [CVE-2019-6522](https://insights.sbomify.com/CVE-2019-6522/): Information disclosure in Moxa IKS, EDS (critical 9.1)
- [CVE-2019-6561](https://insights.sbomify.com/CVE-2019-6561/): Cross-site request forgery in Moxa IKS, EDS (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-6557 and fix it if it is affected.

What it is: CVE-2019-6557 is a critical memory corruption vulnerability in ICS-CERT Moxa IKS, EDS, published on 5 Mar 2019. 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-2019-6557 in the wild and no public exploit code.

Affected product: ICS-CERT Moxa IKS, EDS. 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-2019-6557/ (Markdown: https://insights.sbomify.com/CVE-2019-6557/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6557
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6557
- OSV: https://osv.dev/vulnerability/CVE-2019-6557

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-6557/
Summaries are generated and may contain mistakes; the official description above is the record.