# CVE-2019-6536: Memory corruption in LAquis SCADA

> Attackers can execute remote code by tricking users into opening a malicious SCADA configuration file, requiring an upgrade to the latest version.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Mar 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-x7wc-chm7-9xvf

## What is CVE-2019-6536?

CVE-2019-6536 is a high-severity memory corruption vulnerability in LCDS - Leão Consultoria e Desenvolvimento de Sistemas Ltda ME LAquis SCADA, published on 27 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Opening a specially crafted LCDS LAquis SCADA before 4.3.1.71 ELS file may result in a write past the end of an allocated buffer, which may allow an attacker to execute remote code in the context of the current process.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2019-6536?

It affects 1 product.


Products: Lcds Laquis Scada.

## How do I fix CVE-2019-6536?

No fix has been published for CVE-2019-6536 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-6536 being exploited?

There is no known exploitation of CVE-2019-6536 in the wild and no public exploit code.

## Other vulnerabilities in LCDS - Leão Consultoria e Desenvolvimento de Sistemas Ltda ME LAquis SCADA

- [CVE-2018-18996](https://insights.sbomify.com/CVE-2018-18996/): Missing authorization in LCDS Laquis SCADA (critical 9.8)
- [CVE-2018-18998](https://insights.sbomify.com/CVE-2018-18998/): Hardcoded credentials in LCDS Laquis SCADA (critical 9.8)
- [CVE-2018-17893](https://insights.sbomify.com/CVE-2018-17893/): Null dereference in LAquis SCADA (critical 9.8)
- [CVE-2018-17895](https://insights.sbomify.com/CVE-2018-17895/): Memory corruption in LAquis SCADA (critical 9.8)
- [CVE-2018-17897](https://insights.sbomify.com/CVE-2018-17897/): Integer overflow in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-6536 and fix it if it is affected.

What it is: CVE-2019-6536 is a high-severity memory corruption vulnerability in LCDS - Leão Consultoria e Desenvolvimento de Sistemas Ltda ME LAquis SCADA, published on 27 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-6536 in the wild and no public exploit code.

Affected product: LCDS - Leão Consultoria e Desenvolvimento de Sistemas Ltda ME LAquis SCADA. 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-2019-6536/ (Markdown: https://insights.sbomify.com/CVE-2019-6536/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6536
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6536
- OSV: https://osv.dev/vulnerability/CVE-2019-6536

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-6536/
Summaries are generated and may contain mistakes; the official description above is the record.