# CVE-2021-32944: Use after free in Drawings SDK

> A use-after-free in the Drawings SDK allows attackers to execute arbitrary code or cause denial of service via malicious DGN 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:** 17 Jun 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-vp45-9px8-7xw8

## What is CVE-2021-32944?

CVE-2021-32944 is a high-severity use after free vulnerability in Siemens Jt2go, published on 17 Jun 2021. 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

A use-after-free issue exists in the DGN file-reading procedure in the Drawings SDK (All versions prior to 2022.4) resulting from the lack of proper validation of user-supplied data. This can result in a memory corruption or arbitrary code execution, allowing attackers to cause a denial-of-service condition or execute code in the context of the current process.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2021-32944?

It affects 4 products.


Products: Opendesign Drawings Sdk, Siemens Comos, Siemens Jt2go, Siemens Teamcenter Visualization.

## How do I fix CVE-2021-32944?

No fix has been published for CVE-2021-32944 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-32944 being exploited?

There is no known exploitation of CVE-2021-32944 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Jt2go

- [CVE-2018-18223](https://insights.sbomify.com/CVE-2018-18223/): Information disclosure in n/a (high 8.1)
- [CVE-2018-18224](https://insights.sbomify.com/CVE-2018-18224/): Information disclosure in n/a (high 8.1)
- [CVE-2023-5180](https://insights.sbomify.com/CVE-2023-5180/): Out-of-bounds Write vulnerability exists in ODA Drawings SDK before 2024.12 (high 7.8)
- [CVE-2023-5179](https://insights.sbomify.com/CVE-2023-5179/): Memory corruption in ODA Drawings SDK - All Versions < 2024.10 (high 7.8)
- [CVE-2023-22669](https://insights.sbomify.com/CVE-2023-22669/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-32944 and fix it if it is affected.

What it is: CVE-2021-32944 is a high-severity use after free vulnerability in Siemens Jt2go, published on 17 Jun 2021. 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-2021-32944 in the wild and no public exploit code.

Affected product: Siemens Jt2go. 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-2021-32944/ (Markdown: https://insights.sbomify.com/CVE-2021-32944/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-32944
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-32944
- OSV: https://osv.dev/vulnerability/CVE-2021-32944

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-32944/
Summaries are generated and may contain mistakes; the official description above is the record.