CVE-2023-42115
Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability
- Published
- May 3, 2024
- Updated
- Sep 20, 2024
- Assigning CNA
- zdi
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 95.4%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Exim AUTH Out-Of-Bounds Write 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 write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17434.
Sources
2- CVE-2023-42115Exploit
Remote code execution exploit for Exim AUTH out-of-bounds write vulnerability (CVE-2023-42115). No authentication required; includes build and usage instructions for penetration testing.
- cve-2023-42115Exploit
Python-based exploit and reverse shell payload generator for CVE-2023-42115, featuring scan and exploit modes with cross-platform payload creation.
Responsible use
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