# CVE-2021-30166: MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera - Command Injection

> Remote attackers with privileged access can execute arbitrary commands via the NTP Server configuration function in LILIN IP cameras.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Apr 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-3g9r-wrp4-36rm

## What is CVE-2021-30166?

CVE-2021-30166 is a high-severity command injection vulnerability in MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera firmware, published on 28 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The NTP Server configuration function of the IP camera device is not verified with special parameters. Remote attackers can perform a command Injection attack and execute arbitrary commands after logging in with the privileged permission.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2021-30166?

It affects 41 products.


Products: Meritlilin P2g1022 Firmware, Meritlilin P2g1022x Firmware, Meritlilin P2g1052 Firmware, Meritlilin P2r3022ae2 Firmware, Meritlilin P2r3052ae2 Firmware, Meritlilin P2r6322ae2 Firmware, Meritlilin P2r6322ae4 Firmware, Meritlilin P2r6352ae2 Firmware, Meritlilin P2r6352ae4 Firmware, Meritlilin P2r6522e2 Firmware, Meritlilin P2r6522e4 Firmware, Meritlilin P2r6552e2 Firmware, Meritlilin P2r6552e4 Firmware, Meritlilin P2r6822e2 Firmware, Meritlilin P2r6822e4 Firmware, Meritlilin P2r6852e2 Firmware, Meritlilin P2r6852e4 Firmware, Meritlilin P2r8822e2 Firmware, Meritlilin P2r8822e4 Firmware, Meritlilin P2r8852e2 Firmware and 21 more.

## How do I fix CVE-2021-30166?

No fix has been published for CVE-2021-30166 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-30166 being exploited?

There is no known exploitation of CVE-2021-30166 in the wild and no public exploit code.

## Other vulnerabilities in MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera firmware

- [CVE-2021-30167](https://insights.sbomify.com/CVE-2021-30167/): MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera - Broken Authentication (critical 9.8)
- [CVE-2021-30168](https://insights.sbomify.com/CVE-2021-30168/): MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera - Sensitive Data Exposure-1 (critical 9.8)
- [CVE-2021-30169](https://insights.sbomify.com/CVE-2021-30169/): MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera - Sensitive Data Exposure-2 (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-30166 and fix it if it is affected.

What it is: CVE-2021-30166 is a high-severity command injection vulnerability in MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera firmware, published on 28 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-30166 in the wild and no public exploit code.

Affected product: MERIT LILIN ENT.CO.,LTD. P2/Z2/P3/Z3 IP camera firmware. 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-2021-30166/ (Markdown: https://insights.sbomify.com/CVE-2021-30166/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-30166
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-30166
- OSV: https://osv.dev/vulnerability/CVE-2021-30166

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-30166/
Summaries are generated and may contain mistakes; the official description above is the record.