CVE-2023-42116— Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability
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I. Basic Information for CVE-2023-42116
Vulnerability Information
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Vulnerability Title
Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Exim SMTP Challenge Stack-based Buffer Overflow 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 handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17515.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
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，该漏洞源于在将用户提供的数据复制到基于堆栈的固定长度缓冲区之前缺乏对用户提供的数据的长度进行正确验证。
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
II. Public POCs for CVE-2023-42116
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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-2023-42117 | Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability | |
| CVE-2023-42115 | Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability |
IV. Related Vulnerabilities
Same weakness: CWE-121
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Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
V. Comments for CVE-2023-42116
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