# CVE-2017-17746: Auth bypass in n/a

> An attacker on a NAT network can bypass authentication on TP-Link switches if an administrator logs in, gaining unauthorized access to the device.

- **Severity:** Medium 6.8 (`CVSS:3.0/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Dec 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-4f3r-2vxp-mj25

## What is CVE-2017-17746?

CVE-2017-17746 is a medium-severity authentication bypass vulnerability in n/a, published on 20 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Weak access control methods on the TP-Link TL-SG108E 1.0.0 allow any user on a NAT network with an authenticated administrator to access the device without entering user credentials. The authentication record is stored on the device; thus if an administrator authenticates from a NAT network, the authentication applies to the IP address of the NAT gateway, and any user behind that NAT gateway is also treated as authenticated.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2017-17746?

It affects 1 product.


Products: Tp-Link Tl-Sg108e Firmware.

## How do I fix CVE-2017-17746?

No fix has been published for CVE-2017-17746 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-17746 being exploited?

There is no known exploitation of CVE-2017-17746 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-8074](https://insights.sbomify.com/CVE-2017-8074/): Information disclosure in n/a (critical 9.8)
- [CVE-2017-8075](https://insights.sbomify.com/CVE-2017-8075/): Information disclosure in n/a (critical 9.8)
- [CVE-2017-8076](https://insights.sbomify.com/CVE-2017-8076/): Weak cryptography in n/a (critical 9.8)
- [CVE-2017-8077](https://insights.sbomify.com/CVE-2017-8077/): Hardcoded credentials in n/a (high 7.5)
- [CVE-2017-17747](https://insights.sbomify.com/CVE-2017-17747/): Missing authorization in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-17746 and fix it if it is affected.

What it is: CVE-2017-17746 is a medium-severity authentication bypass vulnerability in n/a, published on 20 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-17746 in the wild and no public exploit code.

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-2017-17746/ (Markdown: https://insights.sbomify.com/CVE-2017-17746/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-17746
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-17746
- OSV: https://osv.dev/vulnerability/CVE-2017-17746

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-17746/
Summaries are generated and may contain mistakes; the official description above is the record.