# CVE-2023-46977: Memory corruption in n/a

> A stack overflow in the loginAuth function allows attackers to execute arbitrary code or cause denial of service on TOTOLINK LR1200GB routers.

- **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:** 31 Oct 2023
- **Updated:** 6 Sep 2024
- **Also known as:** GHSA-qpmm-prhw-gc28

## What is CVE-2023-46977?

CVE-2023-46977 is a critical memory corruption vulnerability in n/a, published on 31 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TOTOLINK LR1200GB V9.1.0u.6619_B20230130 was discovered to contain a stack overflow via the password parameter in the function loginAuth.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2023-46977?

It affects 1 product.


Products: Totolink Lr1200gb Firmware.

## How do I fix CVE-2023-46977?

No fix has been published for CVE-2023-46977 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-46977 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46977 exists.

## Other vulnerabilities in n/a

- [CVE-2024-1783](https://insights.sbomify.com/CVE-2024-1783/): Totolink LR1200GB Web Interface cstecgi.cgi loginAuth stack-based overflow (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-2023-46977 and fix it if it is affected.

What it is: CVE-2023-46977 is a critical memory corruption vulnerability in n/a, published on 31 Oct 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-2023-46977 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-2023-46977/ (Markdown: https://insights.sbomify.com/CVE-2023-46977/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-46977
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-46977
- OSV: https://osv.dev/vulnerability/CVE-2023-46977

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-46977/
Summaries are generated and may contain mistakes; the official description above is the record.