# CVE-2021-45966: Command injection in n/a

> Remote attackers can execute arbitrary code via shell metacharacters in the management REST API of Pascom Cloud Phone System.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Mar 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7x56-fv78-3rq9

## What is CVE-2021-45966?

CVE-2021-45966 is a critical command injection vulnerability in n/a, published on 18 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Pascom Cloud Phone System before 7.20.x. In the management REST API, /services/apply in exd.pl allows remote attackers to execute arbitrary code via shell metacharacters.

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

## Which versions are affected by CVE-2021-45966?

It affects 1 product.


Products: Pascom Cloud Phone System.

## How do I fix CVE-2021-45966?

No fix has been published for CVE-2021-45966 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45966 being exploited?

There is no known exploitation of CVE-2021-45966 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45966 and fix it if it is affected.

What it is: CVE-2021-45966 is a critical command injection vulnerability in n/a, published on 18 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-45966 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-2021-45966/ (Markdown: https://insights.sbomify.com/CVE-2021-45966/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45966
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45966
- OSV: https://osv.dev/vulnerability/CVE-2021-45966

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45966/
Summaries are generated and may contain mistakes; the official description above is the record.