CVE-2023-42114 Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability
Remote attackers can disclose sensitive information from Exim mail servers via an out-of-bounds read in NTLM challenge handling without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-42114?
CVE-2023-42114 is a low-severity vulnerability in Exim Exim, published on 3 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2023-42114?
It affects 1 product.
Products include Exim Exim.
How do I fix CVE-2023-42114?
Apply the vendor's patch.
Is CVE-2023-42114 being exploited?
There is no known exploitation of CVE-2023-42114 in the wild and no public exploit code.
Other vulnerabilities in Exim Exim
Sources
Also known as CLEANSTART-2025-PN80163, DEBIAN-CVE-2023-42114, GHSA-h5j4-2q8w-q3q4, UBUNTU-CVE-2023-42114.