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CVE-2023-42116— Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability

Quick assessment

Affected
Exim Exim
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.

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。

AI Predicted 9.8 Difficulty: Easy EPSS 3.76% · P90
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
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

Vendor Product Affected Versions CPE Subscribe
Exim Exim exim 4.95 -

II. Public POCs for CVE-2023-42116

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III. Intelligence Information for CVE-2023-42116

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Vendor Advisories for CVE-2023-42116 (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-2023-42117 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 product: Exim
Same vendor: Exim
Same weakness: CWE-121

V. Comments for CVE-2023-42116

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