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CVE-2023-42117— Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability

Quick assessment

Affected
Exim Exim
Exploitation
High exploitation probability; assess promptly
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Exim 错误地处理了用户提供的验证数据，导致内存损坏。

AI Predicted 9.8 Difficulty: Easy EPSS 6.79% · P94
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I. Basic Information for CVE-2023-42117

Vulnerability Information
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Vulnerability Title
Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Exim Improper Neutralization of Special Elements 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 memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对特殊元素的转义处理不恰当
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Exim 错误地处理了用户提供的验证数据，导致内存损坏。
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 4.96-RC1-11-315206fbf -

II. Public POCs for CVE-2023-42117

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III. Intelligence Information for CVE-2023-42117

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Vendor Advisories for CVE-2023-42117 (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-2023-42115 Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Exim
Same vendor: Exim
Same weakness: CWE-138

V. Comments for CVE-2023-42117

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