# CVE-2024-1000: Totolink N200RE cstecgi.cgi setTracerouteCfg stack-based overflow

> Remote attackers can execute arbitrary code via a stack-based buffer overflow in the setTracerouteCfg function of Totolink N200RE routers.

- **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-qrpx-55hc-9pr8

## What is CVE-2024-1000?

CVE-2024-1000 is a high-severity memory corruption vulnerability in Totolink N200RE, published on 29 Jan 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability was found in Totolink N200RE 9.3.5u.6139_B20201216. It has been rated as critical. This issue affects the function setTracerouteCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument command leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-252269 was assigned to this vulnerability. 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-2024-1000?

It affects 1 product.


Products: Totolink N200re Firmware.

## How do I fix CVE-2024-1000?

No fix has been published for CVE-2024-1000 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-1000 being exploited?

There is no known exploitation of CVE-2024-1000 in the wild and no public exploit code.

## Other vulnerabilities in Totolink N200RE

- [CVE-2024-0296](https://insights.sbomify.com/CVE-2024-0296/): Totolink N200RE cstecgi.cgi NTPSyncWithHost os command injection (high 7.3)
- [CVE-2024-0297](https://insights.sbomify.com/CVE-2024-0297/): Totolink N200RE cstecgi.cgi UploadFirmwareFile os command injection (high 7.3)
- [CVE-2024-0298](https://insights.sbomify.com/CVE-2024-0298/): Totolink N200RE cstecgi.cgi setDiagnosisCfg os command injection (high 7.3)
- [CVE-2024-0299](https://insights.sbomify.com/CVE-2024-0299/): Totolink N200RE cstecgi.cgi setTracerouteCfg os command injection (high 7.3)
- [CVE-2024-0997](https://insights.sbomify.com/CVE-2024-0997/): Totolink N200RE cstecgi.cgi setOpModeCfg stack-based overflow (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-1000 and fix it if it is affected.

What it is: CVE-2024-1000 is a high-severity memory corruption vulnerability in Totolink N200RE, 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-2024-1000 in the wild and no public exploit code.

Affected product: Totolink N200RE. 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-2024-1000/ (Markdown: https://insights.sbomify.com/CVE-2024-1000/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-1000
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-1000
- OSV: https://osv.dev/vulnerability/CVE-2024-1000

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-1000/
Summaries are generated and may contain mistakes; the official description above is the record.