# CVE-2021-4326: Imperative Local Command Injection allows Activity Masking

> Privileged local users can execute arbitrary shell commands via Zowe CLI plugin operations or environment variables.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:U/RC:C/CR:L/IR:X/AR:X/MAV:L/MAC:L/MPR:L/MUI:N/MS:U/MC:L/MI:X/MA:X`)
- **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:** Yes
- **Published:** 22 Feb 2023
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-6q8m-42qq-64r7

## What is CVE-2021-4326?

CVE-2021-4326 is a low-severity command injection vulnerability in Open Mainframe Project Zowe, published on 22 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in Imperative framework which allows already-privileged local actors to execute arbitrary shell commands via plugin install/update commands, or maliciously formed environment variables. Impacts Zowe CLI.

## Which versions are affected by CVE-2021-4326?

4 open source packages ship an affected version, including @zowe/imperative. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@zowe/imperative` | npm | All versions | 4.18.10 |
| `@zowe/imperative` | npm | All versions | 4.18.10 |
| `@zowe/imperative` | npm | From 5.0.0 | 5.7.1 |
| `@zowe/imperative` | npm | From 5.0.0 | 5.7.1 |

Products: Linuxfoundation Zowe.

## How do I fix CVE-2021-4326?

Upgrade @zowe/imperative to a fixed version for your release line: 4.18.10 or 5.7.1.

## Is CVE-2021-4326 being exploited?

There is no known exploitation of CVE-2021-4326 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-4326 and fix it if it is affected.

What it is: CVE-2021-4326 is a low-severity command injection vulnerability in Open Mainframe Project Zowe, published on 22 Feb 2023. 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-2021-4326 in the wild and no public exploit code.

Affected packages and fixed versions:
- @zowe/imperative (npm): affected all versions; fixed in 4.18.10
- @zowe/imperative (npm): affected all versions; fixed in 4.18.10
- @zowe/imperative (npm): affected from 5.0.0; fixed in 5.7.1
- @zowe/imperative (npm): affected from 5.0.0; fixed in 5.7.1

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-2021-4326/ (Markdown: https://insights.sbomify.com/CVE-2021-4326/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-4326
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-4326
- OSV: https://osv.dev/vulnerability/CVE-2021-4326

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-4326/
Summaries are generated and may contain mistakes; the official description above is the record.