# CVE-2020-7842: D'live AP command injection vulnerability

> Attackers can execute arbitrary commands on Netis D'live set-top box access points via improper input validation in the NTP server parameter.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:A/AC:H/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 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-mpxw-95w2-p523

## What is CVE-2020-7842?

CVE-2020-7842 is a medium-severity command injection vulnerability in Netis Korea D'live set-top box AP(WF2429TB), published on 20 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Improper Input validation vulnerability exists in Netis Korea D'live AP which could cause arbitrary command injection and execution when the time setting (using ntpServerlp1 parameter) for the users. This affects D'live set-top box AP(WF2429TB) v1.1.10.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2020-7842?

It affects 1 product.


Products: Netu Wf2429tb Firmware.

## How do I fix CVE-2020-7842?

No fix has been published for CVE-2020-7842 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7842 being exploited?

There is no known exploitation of CVE-2020-7842 in the wild and no public exploit code.

Public exploit code:

- https://github.com/GangTaegyeong/CVE-2020-7842 (github_poc): https://github.com/GangTaegyeong/CVE-2020-7842

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7842 and fix it if it is affected.

What it is: CVE-2020-7842 is a medium-severity command injection vulnerability in Netis Korea D'live set-top box AP(WF2429TB), published on 20 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-2020-7842 in the wild and no public exploit code.

Affected product: Netis Korea D'live set-top box AP(WF2429TB). 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-2020-7842/ (Markdown: https://insights.sbomify.com/CVE-2020-7842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7842
- OSV: https://osv.dev/vulnerability/CVE-2020-7842

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7842/
Summaries are generated and may contain mistakes; the official description above is the record.