# CVE-2021-28874: Memory corruption in n/a

> A buffer overflow in SerenityOS LibTextCode allows attackers to execute arbitrary code or cause a crash via a crafted 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:** No
- **Published:** 6 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-m6mw-8fj4-7fh4

## What is CVE-2021-28874?

CVE-2021-28874 is a high-severity memory corruption vulnerability in n/a, published on 6 Apr 2021. 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

SerenityOS fixed as of c9f25bca048443e317f1994ba9b106f2386688c3 contains a buffer overflow vulnerability in LibTextCode through opening a crafted file.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2021-28874?

It affects 1 product.


Products: Serenityos Serenityos.

## How do I fix CVE-2021-28874?

No fix has been published for CVE-2021-28874 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-28874 being exploited?

There is no known exploitation of CVE-2021-28874 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-31272](https://insights.sbomify.com/CVE-2021-31272/): Path traversal in n/a (critical 9.8)
- [CVE-2021-30045](https://insights.sbomify.com/CVE-2021-30045/): Memory corruption in n/a (critical 9.1)
- [CVE-2019-20172](https://insights.sbomify.com/CVE-2019-20172/): Privilege escalation in n/a (high 7.8)
- [CVE-2021-33185](https://insights.sbomify.com/CVE-2021-33185/): Memory corruption in n/a (high 7.5)
- [CVE-2021-33186](https://insights.sbomify.com/CVE-2021-33186/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28874 and fix it if it is affected.

What it is: CVE-2021-28874 is a high-severity memory corruption vulnerability in n/a, published on 6 Apr 2021. 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-2021-28874 in the wild and no public exploit code.

Affected product: n/a. 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-2021-28874/ (Markdown: https://insights.sbomify.com/CVE-2021-28874/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28874
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28874
- OSV: https://osv.dev/vulnerability/CVE-2021-28874

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28874/
Summaries are generated and may contain mistakes; the official description above is the record.