CVE-2023-42114
Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability
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.
INFO
Published Date :
May 3, 2024, 3:15 a.m.
Last Modified :
Aug. 7, 2025, 5:33 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | LOW | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Exim packages.
- Upgrade to Exim version 4.96.1 or later.
Public PoC/Exploit Available at Github
CVE-2023-42114 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-42114.
| URL | Resource |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ | Third Party Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-42114 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-42114
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Exim SMTP Vulnerabilities list
cve exim vulnerabilities
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-42114 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-42114 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 07, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* versions up to (excluding) 4.96.1 Added Reference Type CVE: https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ Types: Third Party Advisory Added Reference Type Zero Day Initiative: https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ Types: Third Party Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ -
CVE Modified by [email protected]
Sep. 18, 2024
Action Type Old Value New Value Changed 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. 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. -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Received by [email protected]
May. 03, 2024
Action Type Old Value New Value Added 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. Added Reference Zero Day Initiative https://www.zerodayinitiative.com/advisories/ZDI-23-1468/ [No types assigned] Added CWE Zero Day Initiative CWE-125 Added CVSS V3 Zero Day Initiative AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N