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CVE-2023-27395

Quick assessment

Affected
SoftEther VPN SoftEther VPN
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SoftEther VPN是一款开源的跨平台多协议VPN（虚拟专用网络）应用程序。 SoftEther VPN 4.41-9782-beta、5.01.9674 和 5.02版本存在安全漏洞，该漏洞源于WpcParsePacket() 函数中存在拒绝服务漏洞，攻击者利用该漏洞可以发送特制的网络数据包导致拒绝服务。

CVSS 9.0 · Critical EPSS 1.54% · P74
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I. Basic Information for CVE-2023-27395

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
SoftEther VPN 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SoftEther VPN是一款开源的跨平台多协议VPN（虚拟专用网络）应用程序。 SoftEther VPN 4.41-9782-beta、5.01.9674 和 5.02版本存在安全漏洞，该漏洞源于WpcParsePacket() 函数中存在拒绝服务漏洞，攻击者利用该漏洞可以发送特制的网络数据包导致拒绝服务。
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
SoftEther VPN SoftEther VPN 4.41-9782-beta -

II. Public POCs for CVE-2023-27395

# POC Description Source Link Shenlong Link
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default-local-qwen3.6 · 9983 chars
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III. Intelligence Information for CVE-2023-27395

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Other References for CVE-2023-27395 (2)

Same Patch Batch · SoftEther VPN · 2023-10-12 · 9 CVEs total

CVE-2023-32634 7.8 HIGH SoftEther VPN 安全漏洞
CVE-2023-25774 7.5 HIGH SoftEther VPN 资源管理错误漏洞
CVE-2023-23581 7.5 HIGH SoftEther VPN 缓冲区错误漏洞
CVE-2023-22308 7.5 HIGH SoftEther VPN 数字错误漏洞
CVE-2023-27516 7.3 HIGH SoftEther VPN 安全漏洞
CVE-2023-22325 5.9 MEDIUM SoftEther VPN 安全漏洞
CVE-2023-32275 5.5 MEDIUM SoftEther VPN 信息泄露漏洞
CVE-2023-31192 5.3 MEDIUM SoftEther VPN 信息泄露漏洞

IV. Related Vulnerabilities

Same product: SoftEther VPN
Same vendor: SoftEther VPN
Same weakness: CWE-122

V. Comments for CVE-2023-27395

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