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Vulnerability · Published May 3, 2024 · Assigned by zdi

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

Low 3.7

In plain English

A low-severity out-of-bounds read in Exim from Exim. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 27.1% (higher than 98% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.0)3.7Low
Exploit odds (30 days)27.1%top 1.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20exim4.96.1-r0ALPINE-CVE-2023-42114
Alpine:v3.21exim4.96.1-r0ALPINE-CVE-2023-42114
Alpine:v3.22exim4.96.1-r0ALPINE-CVE-2023-42114
Alpine:v3.23exim4.96.1-r0ALPINE-CVE-2023-42114
Alpine:v3.24exim4.96.1-r0ALPINE-CVE-2023-42114
Debian:12exim44.96-15+deb12u2DSA-5512-1
Debian:12exim44.96-15+deb12u2DEBIAN-CVE-2023-42114
Debian:13exim44.97~RC1-2DEBIAN-CVE-2023-42114
Debian:14exim44.97~RC1-2DEBIAN-CVE-2023-42114
Ubuntu:22.04:LTSexim44.95-4ubuntu2.3UBUNTU-CVE-2023-42114
Ubuntu:22.04:LTSexim44.95-4ubuntu2.3USN-6411-1

Affected products (as reported)

VendorProductVersions
Exim Exim exim 4.95

Weakness: CWE-125 · Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References