# CVE-2021-23632: Remote Code Execution (RCE)

> The Node.js git library allows remote code execution via OS command injection in the Git.git method due to missing input sanitization.

- **Severity:** Medium 6.6 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Mar 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-9gqr-xp86-f87h, SNYK-JS-GIT-1568518

## What is CVE-2021-23632?

CVE-2021-23632 is a medium-severity command injection vulnerability in git, published on 17 Mar 2022. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

All versions of package git are vulnerable to Remote Code Execution (RCE) due to missing sanitization in the Git.git method, which allows execution of OS commands rather than just git commands. Steps to Reproduce 1. Create a file named exploit.js with the following content: js var Git = require("git").Git; var repo = new Git("repo-test"); var user_input = "version; date"; repo.git(user_input, function(err, result) { console.log(result); }) 2. In the same directory as exploit.js, run npm install git. 3. Run exploit.js: node exploit.js. You should see the outputs of both the git version and date command-lines. Note that the repo-test Git repository does not need to be present to make this PoC work.

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

## Which versions are affected by CVE-2021-23632?

2 open source packages ship an affected version, including git. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `git` | npm | All versions to 0.1.5 | None |
| `git` | npm | All versions to 0.1.5 | None |

Products: Git Project Git.

## How do I fix CVE-2021-23632?

No fix has been published for CVE-2021-23632 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-23632 being exploited?

There is no known exploitation of CVE-2021-23632 in the wild and no public exploit code.

## Other vulnerabilities in git

- [CVE-2015-7082](https://insights.sbomify.com/CVE-2015-7082/): Multiple unspecified vulnerabilities in Git before 2.5.4, as used in Apple Xcode before 7.2, have unknown impact and attack vectors. (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-23632 and fix it if it is affected.

What it is: CVE-2021-23632 is a medium-severity command injection vulnerability in git, published on 17 Mar 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-23632 in the wild and no public exploit code.

Affected packages and fixed versions:
- git (npm): affected all versions up to 0.1.5; no fix listed
- git (npm): affected all versions up to 0.1.5; no fix listed

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-2021-23632/ (Markdown: https://insights.sbomify.com/CVE-2021-23632/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-23632
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-23632
- OSV: https://osv.dev/vulnerability/CVE-2021-23632

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-23632/
Summaries are generated and may contain mistakes; the official description above is the record.