CVE-2023-42117

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.

• CWE-138

• https://www.zerodayinitiative.com/advisories/ZDI-23-1471/Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2024/10/msg00029.html
• https://www.zerodayinitiative.com/advisories/ZDI-23-1471/Third Party Advisory

Published

May 3, 2024

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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