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CVE-2022-0734

Quick assessment

Affected
Zyxel USG/ZyWALL series firmware
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zyxel USG/ZyWALL是中国合勤科技（Zyxel）公司的一款防火墙。 Zyxel USG/ZyWALL 4.35-4.70、USG FLEX 4.50-5.20、ATP 4.35-5.20和VPN 4.35-5.20版本中的CGI程序存在跨站脚本漏洞，该漏洞源于存在输入验证错误，攻击者利用该漏洞可进行跨站点脚本攻击。

CVSS 5.8 · Medium EPSS 9.19% · P95

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2022-0734

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A cross-site scripting vulnerability was identified in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.35 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.35 through 5.20, and VPN series firmware versions 4.35 through 5.20, that could allow an attacker to obtain some information stored in the user's browser, such as cookies or session tokens, via a malicious script.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel USG/ZyWALL 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel USG/ZyWALL是中国合勤科技（Zyxel）公司的一款防火墙。 Zyxel USG/ZyWALL 4.35-4.70、USG FLEX 4.50-5.20、ATP 4.35-5.20和VPN 4.35-5.20版本中的CGI程序存在跨站脚本漏洞，该漏洞源于存在输入验证错误，攻击者利用该漏洞可进行跨站点脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zyxel USG/ZyWALL series firmware 4.35 through 4.70 -
Zyxel USG FLEX series firmware 4.50 through 5.20 -
Zyxel ATP series firmware 4.35 through 5.20 -
Zyxel VPN series firmware 4.35 through 5.20 -

II. Public POCs for CVE-2022-0734

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III. Intelligence Information for CVE-2022-0734

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Other References for CVE-2022-0734 (1)

Same Patch Batch · Zyxel · 2022-05-24 · 4 CVEs total

CVE-2022-26532 7.8 HIGH Zyxel USG/ZyWALL 操作系统命令注入漏洞
CVE-2022-0910 6.5 MEDIUM Zyxel USG/ZyWALL 授权问题漏洞
CVE-2022-26531 6.1 MEDIUM Zyxel USG/ZyWALL 输入验证错误漏洞

IV. Related Vulnerabilities

Same product: USG/ZyWALL series firmware
Same vendor: Zyxel
Same weakness: CWE-79

V. Comments for CVE-2022-0734

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