# CVE-2024-1783: Totolink LR1200GB Web Interface cstecgi.cgi loginAuth stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the web interface login function, potentially executing arbitrary code on the router.

- **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:** 23 Feb 2024
- **Updated:** 12 Aug 2024
- **Also known as:** GHSA-7q9j-8gpw-vmc6

## What is CVE-2024-1783?

CVE-2024-1783 is a critical memory corruption vulnerability in Totolink LR1200GB, published on 23 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability classified as critical has been found in Totolink LR1200GB 9.1.0u.6619_B20230130/9.3.5u.6698_B20230810. Affected is the function loginAuth of the file /cgi-bin/cstecgi.cgi of the component Web Interface. The manipulation of the argument http_host leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-254574 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2024-1783?

It affects 1 product.


Products: Totolink Lr1200gb Firmware.

## How do I fix CVE-2024-1783?

No fix has been published for CVE-2024-1783 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-1783 being exploited?

There is no known exploitation of CVE-2024-1783 in the wild and no public exploit code.

## Other vulnerabilities in Totolink LR1200GB

- [CVE-2023-46977](https://insights.sbomify.com/CVE-2023-46977/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-0571](https://insights.sbomify.com/CVE-2024-0571/): Totolink LR1200GB cstecgi.cgi setSmsCfg stack-based overflow (high 8.8)
- [CVE-2024-0572](https://insights.sbomify.com/CVE-2024-0572/): Totolink LR1200GB cstecgi.cgi setOpModeCfg stack-based overflow (high 8.8)
- [CVE-2024-0573](https://insights.sbomify.com/CVE-2024-0573/): Totolink LR1200GB cstecgi.cgi setDiagnosisCfg stack-based overflow (high 8.8)
- [CVE-2024-0574](https://insights.sbomify.com/CVE-2024-0574/): Totolink LR1200GB cstecgi.cgi setParentalRules stack-based overflow (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-1783 and fix it if it is affected.

What it is: CVE-2024-1783 is a critical memory corruption vulnerability in Totolink LR1200GB, published on 23 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-1783 in the wild and no public exploit code.

Affected product: Totolink LR1200GB. 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-2024-1783/ (Markdown: https://insights.sbomify.com/CVE-2024-1783/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-1783
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-1783
- OSV: https://osv.dev/vulnerability/CVE-2024-1783

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-1783/
Summaries are generated and may contain mistakes; the official description above is the record.