# CVE-2020-28055: Path traversal in n/a

> A local attacker can read and write sensitive system directories on TCL Smart TVs, enabling fake system upgrades and potential privilege escalation.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **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-6f2c-v56g-c746

## What is CVE-2020-28055?

CVE-2020-28055 is a high-severity path traversal 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 a local unprivileged attacker, such as a malicious App, to read & write to the /data/vendor/tcl, /data/vendor/upgrade, and /var/TerminalManager directories within the TV file system. An attacker, such as a malicious APK or local unprivileged user could perform fake system upgrades by writing to the /data/vendor/upgrage folder.

Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2020-28055?

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-2020-28055?

No fix has been published for CVE-2020-28055 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-28055 being exploited?

There is no known exploitation of CVE-2020-28055 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-27403](https://insights.sbomify.com/CVE-2020-27403/): Information disclosure in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-28055 and fix it if it is affected.

What it is: CVE-2020-28055 is a high-severity path traversal 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-2020-28055 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-2020-28055/ (Markdown: https://insights.sbomify.com/CVE-2020-28055/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-28055
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-28055
- OSV: https://osv.dev/vulnerability/CVE-2020-28055

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-28055/
Summaries are generated and may contain mistakes; the official description above is the record.