# CVE-2024-0991: Tenda i6 httpd setcfm formSetCfm stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the Tenda i6 router's httpd service via the setcfm form, potentially executing arbitrary code.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jan 2024
- **Updated:** 18 Oct 2024
- **Also known as:** GHSA-j8ch-gmcj-9qgp

## What is CVE-2024-0991?

CVE-2024-0991 is a high-severity memory corruption vulnerability in Tenda i6, published on 29 Jan 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability has been found in Tenda i6 1.0.0.9(3857) and classified as critical. This vulnerability affects the function formSetCfm of the file /goform/setcfm of the component httpd. The manipulation of the argument funcpara1 leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-252256. 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-2024-0991?

It affects 1 product.


Products: Tenda I6 Firmware.

## How do I fix CVE-2024-0991?

No fix has been published for CVE-2024-0991 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-0991 being exploited?

There is no known exploitation of CVE-2024-0991 in the wild and no public exploit code.

## Other vulnerabilities in Tenda i6

- [CVE-2023-48963](https://insights.sbomify.com/CVE-2023-48963/): Memory corruption in n/a (high 7.5)
- [CVE-2023-48964](https://insights.sbomify.com/CVE-2023-48964/): Memory corruption in n/a (high 7.5)
- [CVE-2024-0990](https://insights.sbomify.com/CVE-2024-0990/): Tenda i6 httpd setAutoPing formSetAutoPing stack-based overflow (high 7.2)
- [CVE-2024-0992](https://insights.sbomify.com/CVE-2024-0992/): Tenda i6 httpd wifiSSIDset formwrlSSIDset stack-based overflow (high 7.2)
- [CVE-2024-0993](https://insights.sbomify.com/CVE-2024-0993/): Tenda i6 httpd WifiMacFilterGet formWifiMacFilterGet stack-based overflow (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-0991 and fix it if it is affected.

What it is: CVE-2024-0991 is a high-severity memory corruption vulnerability in Tenda i6, published on 29 Jan 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-0991 in the wild and no public exploit code.

Affected product: Tenda i6. 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-2024-0991/ (Markdown: https://insights.sbomify.com/CVE-2024-0991/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-0991
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-0991
- OSV: https://osv.dev/vulnerability/CVE-2024-0991

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-0991/
Summaries are generated and may contain mistakes; the official description above is the record.