CVE-2023-4494— Easy Chat Server Stack-based buffer overflow vulnerability
Quick assessment
Affected
EFS Software Easy Chat Server
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.
Chat Server是ramank775个人开发者的基于微服务架构的聊天服务器，支持高可用、高吞吐、横向扩展。 Easy Chat Server 3.1版本存在缓冲区错误漏洞，该漏洞源于存在缓冲区溢出漏洞。攻击者可利用该漏洞通过GET请求向register.ghp文件发送字符串执行任意代码。
Possible ATT&CK Techniques 2 AI
T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-4494
Vulnerability Information
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Vulnerability Title
Easy Chat Server Stack-based buffer overflow vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Stack-based buffer overflow vulnerability in Easy Chat Server 3.1 version. An attacker could send an excessively long username string to the register.ghp file asking for the name via a GET request resulting in arbitrary code execution on the remote machine.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Chat Server 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Chat Server是ramank775个人开发者的基于微服务架构的聊天服务器，支持高可用、高吞吐、横向扩展。 Easy Chat Server 3.1版本存在缓冲区错误漏洞，该漏洞源于存在缓冲区溢出漏洞。攻击者可利用该漏洞通过GET请求向register.ghp文件发送字符串执行任意代码。
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 |
|---|---|---|---|---|
| EFS Software | Easy Chat Server | 0 ~ 3.1 | - |
|
II. Public POCs for CVE-2023-4494
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2023-4494 (1)
Same Patch Batch · EFS Software · 2023-10-04 · 7 CVEs total
| CVE-2023-4491 | 9.8 CRITICAL | Easy Address Book Web Server Buffer overflow vulnerability |
| CVE-2023-4497 | 6.1 MEDIUM | Easy Chat Server XSS vulnerability |
| CVE-2023-4496 | 6.1 MEDIUM | Easy Chat Server XSS vulnerability |
| CVE-2023-4495 | 6.1 MEDIUM | Easy Chat Server XSS vulnerability |
| CVE-2023-4493 | 6.1 MEDIUM | Easy Address Book Web Server Stored XSS vulnerability |
| CVE-2023-4492 | 6.1 MEDIUM | Easy Address Book Web Server XSS vulnerability |
IV. Related Vulnerabilities
Same vendor: EFS Software
V. Comments for CVE-2023-4494
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