Exim < 4.96.2 - Unauthenticated Remote Code Execution via SMTP Service
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2023-42117. PoCs published by exploitintel.
AI-analyzed exploit summary This repository contains functional exploit code for CVE-2023-42117, a critical vulnerability in Exim MTA's IP address parser. The PoC scripts demonstrate multiple attack vectors (leading signs, leading zeros, malformed IPv6, whitespace) that bypass validation and crash the Exim child process, resulting in a pre-authentication DoS.
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.
Exploits (1)
This repository contains functional exploit code for CVE-2023-42117, a critical vulnerability in Exim MTA's IP address parser. The PoC scripts demonstrate multiple attack vectors (leading signs, leading zeros, malformed IPv6, whitespace) that bypass validation and crash the Exim child process, resulting in a pre-authentication DoS.
References (2)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H