# CVE-2020-3757: Memory corruption in Adobe Flash Player

> A type confusion vulnerability in Adobe Flash Player allows attackers to execute arbitrary code via malicious content.

- **Severity:** High 8.8 (`CVSS:3.1/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:** Yes
- **Published:** 13 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-pcc6-9jm9-hfp4, MGASA-2020-0085, RHSA-2020:0513

## What is CVE-2020-3757?

CVE-2020-3757 is a high-severity memory corruption vulnerability in Adobe Flash Player, published on 13 Feb 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

Adobe Flash Player versions 32.0.0.321 and earlier, 32.0.0.314 and earlier, 32.0.0.321 and earlier, and 32.0.0.255 and earlier have a type confusion vulnerability. Successful exploitation could lead to arbitrary code execution.

Weakness: CWE-843 (Access of Resource Using Incompatible Type)

## Which versions are affected by CVE-2020-3757?

It affects 4 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `flash-plugin` | Red Hat:rhel_extras:6 | All versions | 0:32.0.0.330-1.el6_10 |

Products: Adobe Flash Player, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2020-3757?

Apply the vendor's patch.

## Is CVE-2020-3757 being exploited?

There is no known exploitation of CVE-2020-3757 in the wild and no public exploit code.

## Other vulnerabilities in Adobe Flash Player

- [CVE-2017-11292](https://insights.sbomify.com/CVE-2017-11292/): Adobe Flash Player Type Confusion (high 8.8, exploited in the wild)
- [CVE-2016-7892](https://insights.sbomify.com/CVE-2016-7892/): Adobe Flash Player Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2016-7855](https://insights.sbomify.com/CVE-2016-7855/): Adobe Flash Player Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2014-0497](https://insights.sbomify.com/CVE-2014-0497/): Adobe Flash Player Integer Underflow Vulnerablity (high 8.8, exploited in the wild)
- [CVE-2013-0643](https://insights.sbomify.com/CVE-2013-0643/): Adobe Flash Player Incorrect Default Permissions (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3757 and fix it if it is affected.

What it is: CVE-2020-3757 is a high-severity memory corruption vulnerability in Adobe Flash Player, published on 13 Feb 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-2020-3757 in the wild and no public exploit code.

Affected product: Adobe Flash Player. 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-2020-3757/ (Markdown: https://insights.sbomify.com/CVE-2020-3757/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3757
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3757
- OSV: https://osv.dev/vulnerability/CVE-2020-3757

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3757/
Summaries are generated and may contain mistakes; the official description above is the record.