CVE-2023-42114

Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability

MEDIUM
5.3
CVSS Score
Published: May 3, 2024 at 02:13 AM UTC
Updated: June 17, 2026 at 06:23 AM UTC
1 product affected across 1 vendorExim

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Severity
MEDIUM5.3
Exploit prediction
EPSS 27%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.96.1v < 4.974.95
Affected range stops below 4.96.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.97, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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