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CVE-2023-42115— Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability

Quick assessment

Affected
Exim Exim
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.

Exim是一个运行于Unix系统中的开源消息传送代理（MTA），它主要负责邮件的路由、转发和投递。 Exim存在安全漏洞，该漏洞源于缺乏对用户提供的数据进行正确验证，导致写入超出缓冲区末尾。

AI Predicted 9.8 Difficulty: Easy EPSS 11.71% · P96

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-42115

Vulnerability Information
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Vulnerability Title
Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17434.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Exim 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Exim是一个运行于Unix系统中的开源消息传送代理（MTA），它主要负责邮件的路由、转发和投递。 Exim存在安全漏洞，该漏洞源于缺乏对用户提供的数据进行正确验证，导致写入超出缓冲区末尾。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Exim Exim exim 4.95 -

II. Public POCs for CVE-2023-42115

# POC Description Source Link Shenlong Link
1 PoC for Exim CVE-2023-42115 https://github.com/cammclain/CVE-2023-42115 POC Details
2 This module exploits a vulnerability in the target service identified as CVE-2023-42115. It sends a crafted payload to the vulnerable service to achieve a specific action. https://github.com/isotaka134/cve-2023-42115 POC Details
3 This module exploits a vulnerability in the target service identified as CVE-2023-42115. https://github.com/kirinse/cve-2023-42115 POC Details
4 A CVE-2023-42115 POC https://github.com/AdaHop-Cyber-Security/Pocy POC Details
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III. Intelligence Information for CVE-2023-42115

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Vendor Advisories for CVE-2023-42115 (1)

Same Patch Batch · Exim · 2024-05-03 · 6 CVEs total

CVE-2023-42114 Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability
CVE-2023-42119 Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability
CVE-2023-42118 Exim libspf2 Integer Underflow Remote Code Execution Vulnerability
CVE-2023-42116 Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability
CVE-2023-42117 Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Exim
Same vendor: Exim
Same weakness: CWE-787

V. Comments for CVE-2023-42115

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