# CVE-2023-27063: Memory corruption in n/a

> Attackers can cause a Denial of Service on Tenda routers by sending a crafted request to the DNS forwarding function.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/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:** 13 Mar 2023
- **Updated:** 27 Feb 2025
- **Also known as:** GHSA-26jv-87ph-mc8q

## What is CVE-2023-27063?

CVE-2023-27063 is a critical memory corruption vulnerability in n/a, published on 13 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Tenda V15V1.0 V15.11.0.14(1521_3190_1058) was discovered to contain a buffer overflow vulnerability via the DNSDomainName parameter in the formModifyDnsForward function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

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

## Which versions are affected by CVE-2023-27063?

It affects 1 product.


Products: Tenda W15e Firmware.

## How do I fix CVE-2023-27063?

No fix has been published for CVE-2023-27063 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-27063 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27063 exists.

## Other vulnerabilities in n/a

- [CVE-2023-27061](https://insights.sbomify.com/CVE-2023-27061/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-42058](https://insights.sbomify.com/CVE-2022-42058/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-4115](https://insights.sbomify.com/CVE-2024-4115/): Tenda W15E AddDnsForward formAddDnsForward stack-based overflow (high 8.8)
- [CVE-2024-4116](https://insights.sbomify.com/CVE-2024-4116/): Tenda W15E DelDhcpRule formDelDhcpRule stack-based overflow (high 8.8)
- [CVE-2024-4117](https://insights.sbomify.com/CVE-2024-4117/): Tenda W15E DelPortMapping formDelPortMapping stack-based overflow (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-27063 and fix it if it is affected.

What it is: CVE-2023-27063 is a critical memory corruption vulnerability in n/a, published on 13 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27063 exists.

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-2023-27063/ (Markdown: https://insights.sbomify.com/CVE-2023-27063/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-27063
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-27063
- OSV: https://osv.dev/vulnerability/CVE-2023-27063

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-27063/
Summaries are generated and may contain mistakes; the official description above is the record.