# CVE-2018-8833: Memory corruption in Advantech WebAccess HMI Designer

> Heap-based buffer overflow in Advantech WebAccess HMI Designer allows remote code execution via crafted .pm3 files.

- **Severity:** High 7.8 (`CVSS:3.1/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:** 25 Apr 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-qv8h-5j9g-63mm

## What is CVE-2018-8833?

CVE-2018-8833 is a high-severity memory corruption vulnerability in ICS-CERT Advantech WebAccess HMI Designer, published on 25 Apr 2018. 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

Heap-based buffer overflow vulnerabilities in Advantech WebAccess HMI Designer 2.1.7.32 and prior caused by processing specially crafted .pm3 files may allow remote code execution.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2018-8833?

It affects 1 product.


Products: Advantech Webaccess Hmi Designer.

## How do I fix CVE-2018-8833?

No fix has been published for CVE-2018-8833 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-8833 being exploited?

There is no known exploitation of CVE-2018-8833 in the wild and no public exploit code.

## Other vulnerabilities in ICS-CERT Advantech WebAccess HMI Designer

- [CVE-2019-10961](https://insights.sbomify.com/CVE-2019-10961/): Memory corruption in Advantech WebAccess HMI Designer (high 8.8)
- [CVE-2021-42706](https://insights.sbomify.com/CVE-2021-42706/): AzeoTech DAQFactory (high 7.8)
- [CVE-2018-8835](https://insights.sbomify.com/CVE-2018-8835/): Use after free in Advantech WebAccess HMI Designer (high 7.8)
- [CVE-2018-8837](https://insights.sbomify.com/CVE-2018-8837/): Memory corruption in Advantech WebAccess HMI Designer (high 7.8)
- [CVE-2021-42703](https://insights.sbomify.com/CVE-2021-42703/): AzeoTech DAQFactory (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-8833 and fix it if it is affected.

What it is: CVE-2018-8833 is a high-severity memory corruption vulnerability in ICS-CERT Advantech WebAccess HMI Designer, published on 25 Apr 2018. 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-2018-8833 in the wild and no public exploit code.

Affected product: ICS-CERT Advantech WebAccess HMI Designer. 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-2018-8833/ (Markdown: https://insights.sbomify.com/CVE-2018-8833/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-8833
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-8833
- OSV: https://osv.dev/vulnerability/CVE-2018-8833

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-8833/
Summaries are generated and may contain mistakes; the official description above is the record.