# CVE-2021-3624: Integer overflow in dcraw

> An integer overflow in dcraw allows arbitrary code execution when processing a maliciously crafted X3F image file.

- **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:** Yes
- **Published:** 18 Apr 2022
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2021-3624, GHSA-rj98-5wmh-q944, UBUNTU-CVE-2021-3624

## What is CVE-2021-3624?

CVE-2021-3624 is a high-severity vulnerability in Debian Debian Linux, published on 18 Apr 2022. 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

There is an integer overflow vulnerability in dcraw. When the victim runs dcraw with a maliciously crafted X3F input image, arbitrary code may be executed in the victim's system.

Weakness: CWE-190 (Integer Overflow or Wraparound), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-3624?

It affects 2 products.


Products: Dcraw Project Dcraw, Debian Debian Linux.

## How do I fix CVE-2021-3624?

Apply the vendor's patch.

## Is CVE-2021-3624 being exploited?

There is no known exploitation of CVE-2021-3624 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2018-19655](https://insights.sbomify.com/CVE-2018-19655/): Memory corruption in n/a (high 8.8)
- [CVE-2018-19565](https://insights.sbomify.com/CVE-2018-19565/): Information disclosure in n/a (high 7.1)
- [CVE-2018-19566](https://insights.sbomify.com/CVE-2018-19566/): Memory corruption in n/a (high 7.1)
- [CVE-2018-19567](https://insights.sbomify.com/CVE-2018-19567/): Denial of service in n/a (medium 5.5)
- [CVE-2018-19568](https://insights.sbomify.com/CVE-2018-19568/): Denial of service in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-3624 and fix it if it is affected.

What it is: CVE-2021-3624 is a high-severity vulnerability in Debian Debian Linux, published on 18 Apr 2022. 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-2021-3624 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2021-3624/ (Markdown: https://insights.sbomify.com/CVE-2021-3624/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3624
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3624
- OSV: https://osv.dev/vulnerability/CVE-2021-3624

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-3624/
Summaries are generated and may contain mistakes; the official description above is the record.