# CVE-2020-6070: Memory corruption in F2fs-tools

> A specially crafted f2fs file triggers out-of-bounds heap operations in fsck.f2fs, allowing attackers to execute arbitrary code.

- **Severity:** Medium 6.7 (`CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 10 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-6070, GHSA-5r6m-66fx-q4cm, MGASA-2020-0436, UBUNTU-CVE-2020-6070

## What is CVE-2020-6070?

CVE-2020-6070 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 10 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An exploitable code execution vulnerability exists in the file system checking functionality of fsck.f2fs 1.12.0. A specially crafted f2fs file can cause a logic flaw and out-of-bounds heap operations, resulting in code execution. An attacker can provide a malicious file to trigger this vulnerability.

Weakness: CWE-131 (Incorrect Calculation of Buffer Size)

## Which versions are affected by CVE-2020-6070?

It affects 2 products.


Products: F2fs-Tools Project F2fs-Tools, Fedoraproject Fedora.

## How do I fix CVE-2020-6070?

Apply the vendor's patch.

## Is CVE-2020-6070 being exploited?

There is no known exploitation of CVE-2020-6070 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2020-6105](https://insights.sbomify.com/CVE-2020-6105/): Code injection in F2fs-Tools (high 8.2)
- [CVE-2020-6108](https://insights.sbomify.com/CVE-2020-6108/): Memory corruption in F2fs-Tools (high 8.2)
- [CVE-2020-6104](https://insights.sbomify.com/CVE-2020-6104/): Information disclosure in F2FS-Tools (medium 4.4)
- [CVE-2020-6106](https://insights.sbomify.com/CVE-2020-6106/): Information disclosure in F2fs-Tools (medium 4.4)
- [CVE-2020-6107](https://insights.sbomify.com/CVE-2020-6107/): Information disclosure in F2fs-Tools (medium 4.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-6070 and fix it if it is affected.

What it is: CVE-2020-6070 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 10 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-6070 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2020-6070/ (Markdown: https://insights.sbomify.com/CVE-2020-6070/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-6070
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-6070
- OSV: https://osv.dev/vulnerability/CVE-2020-6070

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-6070/
Summaries are generated and may contain mistakes; the official description above is the record.