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CVE-2023-6399

Quick assessment

Affected
Zyxel ATP series firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zyxel ATP是中国合勤（Zyxel）公司的一款防火墙。 Zyxel ATP 4.32 到 5.37 Patch 1固件版本存在格式化字符串错误漏洞，该漏洞源于允许经过身份验证的 IPSec VPN 用户通过向受影响的设备发送精心设计的主机名，导致deviceid守护程序拒绝服务。

CVSS 5.7 · Medium EPSS 0.65% · P50
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I. Basic Information for CVE-2023-6399

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, and USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1 could allow an authenticated IPSec VPN user to cause DoS conditions against the “deviceid” daemon by sending a crafted hostname to an affected device if it has the “Device Insight” feature enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部控制的格式字符串
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel ATP 格式化字符串错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel ATP是中国合勤（Zyxel）公司的一款防火墙。 Zyxel ATP 4.32 到 5.37 Patch 1固件版本存在格式化字符串错误漏洞，该漏洞源于允许经过身份验证的 IPSec VPN 用户通过向受影响的设备发送精心设计的主机名，导致deviceid守护程序拒绝服务。
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 ATP series firmware version 4.32 through 5.37 Patch 1 -
Zyxel USG FLEX series firmware version 4.50 through 5.37 Patch 1 -
Zyxel USG FLEX 50(W) series firmware version 4.16 through 5.37 Patch 1 -
Zyxel USG20(W)-VPN series firmware version 4.16 through 5.37 Patch 1 -
Zyxel USG FLEX H series firmware version 1.10 through 1.10 Patch 1 -

II. Public POCs for CVE-2023-6399

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III. Intelligence Information for CVE-2023-6399

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Other References for CVE-2023-6399 (1)

Same Patch Batch · Zyxel · 2024-02-20 · 4 CVEs total

CVE-2023-6764 8.1 HIGH Zyxel ATP 格式化字符串错误漏洞
CVE-2023-6398 7.2 HIGH Zyxel ATP 安全漏洞
CVE-2023-6397 6.5 MEDIUM Zyxel ATP 代码问题漏洞

IV. Related Vulnerabilities

Same product: ATP series firmware
Same vendor: Zyxel
Same weakness: CWE-134

V. Comments for CVE-2023-6399

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