# CVE-2022-0324: Buffer Overflow in Dhcp6relay in Software for Open Networking in the Cloud (SONiC)

> Remote attackers can crash the DHCPv6 relay service via crafted packets, causing denial of service in SONiC network devices.

- **Severity:** High 8.1 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Nov 2022
- **Updated:** 30 Apr 2025
- **Also known as:** GHSA-cq4f-m4r6-7827

## What is CVE-2022-0324?

CVE-2022-0324 is a high-severity memory corruption vulnerability in Linux Foundation Software for Open Networking in the Cloud (SONiC), published on 14 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

There is a vulnerability in DHCPv6 packet parsing code that could be explored by remote attacker to craft a packet that could cause buffer overflow in a memcpy call, leading to out-of-bounds memory write that would cause dhcp6relay to crash. Dhcp6relay is a critical process and could cause dhcp relay docker to shutdown.

Discovered by Eugene Lim of GovTech Singapore.

Weakness: CWE-787 (Out-of-bounds Write), CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2022-0324?

It affects 1 product.


Products: Linuxfoundation Software for Open Networking in the Cloud.

## How do I fix CVE-2022-0324?

No fix has been published for CVE-2022-0324 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-0324 being exploited?

There is no known exploitation of CVE-2022-0324 in the wild and no public exploit code.

Public exploit code:

- PoC for CVE-2022-0324: Buffer Overflow in dhcp6relay of SONiC (github_poc): https://github.com/ngtuonghung/CVE-2022-0324

## Other vulnerabilities in Linux Foundation Software for Open Networking in the Cloud (SONiC)

- [CVE-2024-21418](https://insights.sbomify.com/CVE-2024-21418/): Software for Open Networking in the Cloud (SONiC) Elevation of Privilege Vulnerability (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-0324 and fix it if it is affected.

What it is: CVE-2022-0324 is a high-severity memory corruption vulnerability in Linux Foundation Software for Open Networking in the Cloud (SONiC), published on 14 Nov 2022. 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-2022-0324 in the wild and no public exploit code.

Affected product: Linux Foundation Software for Open Networking in the Cloud (SONiC). 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-2022-0324/ (Markdown: https://insights.sbomify.com/CVE-2022-0324/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-0324
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-0324
- OSV: https://osv.dev/vulnerability/CVE-2022-0324

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-0324/
Summaries are generated and may contain mistakes; the official description above is the record.