# CVE-2018-3870: Memory corruption in Canvas Draw

> An attacker can execute arbitrary code by tricking a user into opening a specially crafted PCX image in Canvas Draw.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/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:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 19 Jul 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-6cf4-cjx5-wc2j

## What is CVE-2018-3870?

CVE-2018-3870 is a high-severity memory corruption vulnerability in ACD Systems Canvas Draw, published on 19 Jul 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

An exploitable out-of-bounds write exists in the PCX parsing functionality of Canvas Draw version 4.0.0. A specially crafted PCX image processed via the application can lead to an out-of-bounds write, overwriting arbitrary data. An attacker can deliver a PCX image to trigger this vulnerability and gain code execution. A different vulnerability than CVE-2018-3871.

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

## Which versions are affected by CVE-2018-3870?

It affects 1 product.


Products: Acdsystems Canvas Draw.

## How do I fix CVE-2018-3870?

No fix has been published for CVE-2018-3870 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-3870 being exploited?

There is no known exploitation of CVE-2018-3870 in the wild and no public exploit code.

## Other vulnerabilities in ACD Systems Canvas Draw

- [CVE-2018-3857](https://insights.sbomify.com/CVE-2018-3857/): Memory corruption in Canvas Draw (high 8.8)
- [CVE-2018-3858](https://insights.sbomify.com/CVE-2018-3858/): Memory corruption in Canvas Draw (high 8.8)
- [CVE-2018-3859](https://insights.sbomify.com/CVE-2018-3859/): Memory corruption in Canvas Draw (high 8.8)
- [CVE-2018-3860](https://insights.sbomify.com/CVE-2018-3860/): Memory corruption in Canvas Draw (high 8.8)
- [CVE-2018-3871](https://insights.sbomify.com/CVE-2018-3871/): Memory corruption in Canvas Draw (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-3870 and fix it if it is affected.

What it is: CVE-2018-3870 is a high-severity memory corruption vulnerability in ACD Systems Canvas Draw, published on 19 Jul 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-3870 in the wild and no public exploit code.

Affected product: ACD Systems Canvas Draw. 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-2018-3870/ (Markdown: https://insights.sbomify.com/CVE-2018-3870/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-3870
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-3870
- OSV: https://osv.dev/vulnerability/CVE-2018-3870

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-3870/
Summaries are generated and may contain mistakes; the official description above is the record.