# CVE-2020-27403: Information disclosure in n/a

> An attacker on the adjacent network or local apps can access an insecure web server to download sensitive system files and credentials from TCL Android Smart TVs.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4x8h-4857-j87h

## What is CVE-2020-27403?

CVE-2020-27403 is a medium-severity vulnerability in n/a, published on 10 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the TCL Android Smart TV series V8-R851T02-LF1 V295 and below and V8-T658T01-LF1 V373 and below by TCL Technology Group Corporation allows an attacker on the adjacent network to arbitrarily browse and download sensitive files over an insecure web server running on port 7989 that lists all files & directories. An unprivileged remote attacker on the adjacent network, can download most system files, leading to serious critical information disclosure. Also, some TV models and/or FW versions may expose the webserver with the entire filesystem accessible on another port. For example, nmap scan for all ports run directly from the TV model U43P6046 (Android 8.0) showed port 7983 not mentioned in the original CVE description, but containing the same directory listing of the entire filesystem. This webserver is bound (at least) to localhost interface and accessible freely to all unprivileged installed apps on the Android such as a regular web browser. Any app can therefore read any files of any other apps including Android system settings including sensitive data such as saved passwords, private keys etc.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2020-27403?

It affects 7 products.


Products: Tcl 32s330 Firmware, Tcl 40s330 Firmware, Tcl 43s434 Firmware, Tcl 50s434 Firmware, Tcl 55s434 Firmware, Tcl 65s434 Firmware, Tcl 75s434 Firmware.

## How do I fix CVE-2020-27403?

No fix has been published for CVE-2020-27403 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-27403 being exploited?

There is no known exploitation of CVE-2020-27403 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-28055](https://insights.sbomify.com/CVE-2020-28055/): Path traversal in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-27403 and fix it if it is affected.

What it is: CVE-2020-27403 is a medium-severity vulnerability in n/a, published on 10 Nov 2020. 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-2020-27403 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-2020-27403/ (Markdown: https://insights.sbomify.com/CVE-2020-27403/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-27403
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-27403
- OSV: https://osv.dev/vulnerability/CVE-2020-27403

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-27403/
Summaries are generated and may contain mistakes; the official description above is the record.