# CVE-2021-37179: Use after free in Solid Edge SE2021

> An attacker can execute arbitrary code by tricking a user into opening a malicious OBJ file in Solid Edge due to a use-after-free flaw.

- **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:** 10 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-jv76-h7hf-p5wh

## What is CVE-2021-37179?

CVE-2021-37179 is a high-severity use after free vulnerability in Siemens Solid Edge SE2021, published on 10 Aug 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 vulnerability has been identified in Solid Edge SE2021 (All Versions < SE2021MP7). The PSKERNEL.dll library in affected application lacks proper validation while parsing user-supplied OBJ files that could lead to a use-after-free condition. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13777)

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2021-37179?

It affects 1 product.


Products: Siemens Solid Edge Se2021 Firmware.

## How do I fix CVE-2021-37179?

No fix has been published for CVE-2021-37179 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37179 being exploited?

There is no known exploitation of CVE-2021-37179 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Solid Edge SE2021

- [CVE-2021-37180](https://insights.sbomify.com/CVE-2021-37180/): Null dereference in Solid Edge SE2021 (high 7.8)
- [CVE-2021-37178](https://insights.sbomify.com/CVE-2021-37178/): XML external entity in Solid Edge SE2021 (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37179 and fix it if it is affected.

What it is: CVE-2021-37179 is a high-severity use after free vulnerability in Siemens Solid Edge SE2021, published on 10 Aug 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-2021-37179 in the wild and no public exploit code.

Affected product: Siemens Solid Edge SE2021. 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-2021-37179/ (Markdown: https://insights.sbomify.com/CVE-2021-37179/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37179
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37179
- OSV: https://osv.dev/vulnerability/CVE-2021-37179

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37179/
Summaries are generated and may contain mistakes; the official description above is the record.