CVE-2023-42115

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-42115
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.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.zerodayinitiative.com/advisories/ZDI-23-1469/ Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-1469/ Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
History

07 Aug 2025, 18:04

Type Values Removed Values Added
References () https://www.zerodayinitiative.com/advisories/ZDI-23-1469/ - () https://www.zerodayinitiative.com/advisories/ZDI-23-1469/ - Third Party Advisory
First Time Exim
Exim exim
CPE cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*

21 Nov 2024, 08:22

Type Values Removed Values Added
References () https://www.zerodayinitiative.com/advisories/ZDI-23-1469/ - () https://www.zerodayinitiative.com/advisories/ZDI-23-1469/ -

18 Sep 2024, 19:15

Type Values Removed Values Added
Summary
  • (es) Vulnerabilidad de ejecución remota de código de escritura fuera de los límites de Exim AUTH. Esta vulnerabilidad permite a atacantes remotos ejecutar código arbitrario en las instalaciones afectadas de Exim. No se requiere autenticación para aprovechar esta vulnerabilidad. La falla específica existe dentro del servicio smtp, que escucha en el puerto TCP 25 de forma predeterminada. El problema se debe a la falta de una validación adecuada de los datos proporcionados por el usuario, lo que puede provocar una escritura más allá del final de un búfer. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto de la cuenta de servicio. Era ZDI-CAN-17434.
Summary (en) 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. (en) 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.

03 May 2024, 03:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-03 03:15

Updated : 2025-08-07 18:04

NVD link : CVE-2023-42115

Mitre link : CVE-2023-42115

CVE.ORG link : CVE-2023-42115

JSON object : View

Products Affected

exim

  • exim
CWE
CWE-787

Out-of-bounds Write