# CVE-2021-29630: Memory corruption in FreeBSD

> A stack buffer overflow in the ggatec daemon allows remote code execution via a malicious network response.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/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:** No
- **Published:** 30 Aug 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-hf69-rp3w-rxrx

## What is CVE-2021-29630?

CVE-2021-29630 is a high-severity memory corruption vulnerability in Freebsd Freebsd, published on 30 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In FreeBSD 13.0-STABLE before n246938-0729ba2f49c9, 12.2-STABLE before r370383, 11.4-STABLE before r370381, 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13, the ggatec daemon does not validate the size of a response before writing it to a fixed-sized buffer allowing a malicious attacker in a privileged network position to overwrite the stack of ggatec and potentially execute arbitrary code.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2021-29630?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2021-29630?

No fix has been published for CVE-2021-29630 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-29630 being exploited?

There is no known exploitation of CVE-2021-29630 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29630 and fix it if it is affected.

What it is: CVE-2021-29630 is a high-severity memory corruption vulnerability in Freebsd Freebsd, published on 30 Aug 2021. 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-2021-29630 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. 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-2021-29630/ (Markdown: https://insights.sbomify.com/CVE-2021-29630/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29630
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29630
- OSV: https://osv.dev/vulnerability/CVE-2021-29630

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-29630/
Summaries are generated and may contain mistakes; the official description above is the record.