# CVE-2024-8227: Tenda O1 DhcpSetSer fromDhcpSetSer stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the DHCP configuration handler of Tenda O1 routers, potentially leading to arbitrary code execution.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Aug 2024
- **Updated:** 28 Aug 2024
- **Also known as:** GHSA-r7gp-3gxw-qrxh

## What is CVE-2024-8227?

CVE-2024-8227 is a high-severity memory corruption vulnerability in Tenda O1, published on 28 Aug 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Tenda O1 1.0.0.7(10648) and classified as critical. Affected by this issue is the function fromDhcpSetSer of the file /goform/DhcpSetSer. The manipulation of the argument dhcpStartIp/dhcpEndIp/dhcpGw/dhcpMask/dhcpLeaseTime/dhcpDns1/dhcpDns2 leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2024-8227?

It affects 1 product.


Products: Tenda O1 Firmware.

## How do I fix CVE-2024-8227?

No fix has been published for CVE-2024-8227 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-8227 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-8227 exists.

## Other vulnerabilities in Tenda O1

- [CVE-2024-8226](https://insights.sbomify.com/CVE-2024-8226/): Tenda O1 setcfm formSetCfm stack-based overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-8227 and fix it if it is affected.

What it is: CVE-2024-8227 is a high-severity memory corruption vulnerability in Tenda O1, published on 28 Aug 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-8227 exists.

Affected product: Tenda O1. 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-2024-8227/ (Markdown: https://insights.sbomify.com/CVE-2024-8227/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-8227
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-8227
- OSV: https://osv.dev/vulnerability/CVE-2024-8227

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-8227/
Summaries are generated and may contain mistakes; the official description above is the record.