CVE-2023-42114 LOW

CVE-2023-42114: Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability

Vendor Exim
Product Exim
Weakness CWE-125
Published May 3, 2024
Last update November 4, 2025

CVSS base score

3.7/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433.

Key dates

02Disclosure timeline

May 3, 2024 CVE published
November 4, 2025 Record updated