# CVE-2021-45916: SUN & MOON RISE CO., LTD. Shockwall - Improper Input Validation

> An authenticated local network attacker can disrupt the Shockwall service by sending malicious responses due to improper input validation.

- **Severity:** Low 3.5 (`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **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:** 3 Jan 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-v723-7fm6-5c8m

## What is CVE-2021-45916?

CVE-2021-45916 is a low-severity denial of service vulnerability in SUN & MOON RISE CO., LTD. Shockwall, published on 3 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The programming function of Shockwall system has an improper input validation vulnerability. An authenticated attacker within the local area network can send malicious response to the server to disrupt the service partially.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-45916?

It affects 1 product.


Products: Smr Shenwang Endpoint Protection Security System.

## How do I fix CVE-2021-45916?

No fix has been published for CVE-2021-45916 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45916 being exploited?

There is no known exploitation of CVE-2021-45916 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45916 and fix it if it is affected.

What it is: CVE-2021-45916 is a low-severity denial of service vulnerability in SUN & MOON RISE CO., LTD. Shockwall, published on 3 Jan 2022. 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-2021-45916 in the wild and no public exploit code.

Affected product: SUN & MOON RISE CO., LTD. Shockwall. 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-2021-45916/ (Markdown: https://insights.sbomify.com/CVE-2021-45916/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45916
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45916
- OSV: https://osv.dev/vulnerability/CVE-2021-45916

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-45916/
Summaries are generated and may contain mistakes; the official description above is the record.