# CVE-2020-9633: Use after free in Adobe Flash Player

> Attackers can execute arbitrary code via a use-after-free flaw in Adobe Flash Player, requiring users to update the plugin.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** Yes
- **Published:** 12 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-hfp4-4377-7cc7, MGASA-2020-0264, RHSA-2020:2547, UBUNTU-CVE-2020-9633

## What is CVE-2020-9633?

CVE-2020-9633 is a critical use after free vulnerability in Adobe Flash Player, published on 12 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Adobe Flash Player Desktop Runtime 32.0.0.371 and earlier, Adobe Flash Player for Google Chrome 32.0.0.371 and earlier, and Adobe Flash Player for Microsoft Edge and Internet Explorer 32.0.0.330 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2020-9633?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `flash-plugin` | Red Hat:rhel_extras:6 | All versions | 0:32.0.0.387-1.el6_10 |

Products: Adobe Flash Player, Adobe Flash Player Desktop Runtime.

## How do I fix CVE-2020-9633?

Apply the vendor's patch.

## Is CVE-2020-9633 being exploited?

There is no known exploitation of CVE-2020-9633 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-2020-9633 and fix it if it is affected.

What it is: CVE-2020-9633 is a critical use after free vulnerability in Adobe Flash Player, published on 12 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-9633 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-2020-9633/ (Markdown: https://insights.sbomify.com/CVE-2020-9633/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9633
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9633
- OSV: https://osv.dev/vulnerability/CVE-2020-9633

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9633/
Summaries are generated and may contain mistakes; the official description above is the record.