# CVE-2020-6155: Memory corruption in Pixar

> A heap overflow in Pixar OpenUSD allows remote code execution when a victim opens a specially crafted malformed binary USD file.

- **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:** 13 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3pfh-89c7-75qg

## What is CVE-2020-6155?

CVE-2020-6155 is a high-severity memory corruption vulnerability in Pixar, published on 13 Nov 2020. 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

A heap overflow vulnerability exists in the Pixar OpenUSD 20.05 while parsing compressed value rep arrays in binary USD files. A specially crafted malformed file can trigger a heap overflow, which can result in remote code execution. To trigger this vulnerability, the victim needs to access an attacker-provided malformed file.

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

## Which versions are affected by CVE-2020-6155?

It affects 1 product.


Products: Pixar Openusd.

## How do I fix CVE-2020-6155?

No fix has been published for CVE-2020-6155 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-6155 being exploited?

There is no known exploitation of CVE-2020-6155 in the wild and no public exploit code.

## Other vulnerabilities in Pixar

- [CVE-2020-13531](https://insights.sbomify.com/CVE-2020-13531/): Use after free in Pixar (high 8.8)
- [CVE-2020-13493](https://insights.sbomify.com/CVE-2020-13493/): Memory corruption in Pixar (high 8.8)
- [CVE-2020-6148](https://insights.sbomify.com/CVE-2020-6148/): Memory corruption in Pixar (high 8.8)
- [CVE-2020-6149](https://insights.sbomify.com/CVE-2020-6149/): Memory corruption in Pixar (high 8.8)
- [CVE-2020-6150](https://insights.sbomify.com/CVE-2020-6150/): Memory corruption in Pixar (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-6155 and fix it if it is affected.

What it is: CVE-2020-6155 is a high-severity memory corruption vulnerability in Pixar, published on 13 Nov 2020. 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-2020-6155 in the wild and no public exploit code.

Affected product: Pixar. 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-2020-6155/ (Markdown: https://insights.sbomify.com/CVE-2020-6155/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-6155
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-6155
- OSV: https://osv.dev/vulnerability/CVE-2020-6155

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-6155/
Summaries are generated and may contain mistakes; the official description above is the record.