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Vulnerability record · CVE-2023-42114 · published 3 May 2024

CVE-2023-42114: Exim out-of-bounds read vulnerability

Exim · Exim

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.

5.3 CVSS 3.1 Medium EPSS 28% · top 2.0% CWE-125 · Out-of-bounds read
5.3CVSS 3.1 base score
28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00002.html
https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-42114), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.