# CVE-2020-27553: Path traversal in n/a

> An attacker can download arbitrary files from the /etc directory without authentication due to a misconfigured web server root directory.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gg38-746h-m28j

## What is CVE-2020-27553?

CVE-2020-27553 is a high-severity path traversal vulnerability in n/a, published on 17 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In BASETech GE-131 BT-1837836 firmware 20180921, the web-server on the system is configured with the option “DocumentRoot /etc“. This allows an attacker with network access to the web-server to download any files from the “/etc” folder without authentication. No path traversal sequences are needed to exploit this vulnerability.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2020-27553?

It affects 1 product.


Products: Basetech Ge-131 Bt-1837836 Firmware.

## How do I fix CVE-2020-27553?

No fix has been published for CVE-2020-27553 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-27553 being exploited?

There is no known exploitation of CVE-2020-27553 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-27555](https://insights.sbomify.com/CVE-2020-27555/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2020-27554](https://insights.sbomify.com/CVE-2020-27554/): Information disclosure in n/a (high 7.5)
- [CVE-2020-27558](https://insights.sbomify.com/CVE-2020-27558/): Auth bypass in n/a (medium 6.5)
- [CVE-2020-27557](https://insights.sbomify.com/CVE-2020-27557/): Hardcoded credentials in n/a (medium 5.5)
- [CVE-2020-27556](https://insights.sbomify.com/CVE-2020-27556/): Auth bypass in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-27553 and fix it if it is affected.

What it is: CVE-2020-27553 is a high-severity path traversal vulnerability in n/a, published on 17 Nov 2020. 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-2020-27553 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-2020-27553/ (Markdown: https://insights.sbomify.com/CVE-2020-27553/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-27553
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-27553
- OSV: https://osv.dev/vulnerability/CVE-2020-27553

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-27553/
Summaries are generated and may contain mistakes; the official description above is the record.