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Vulnerability · Published May 3, 2024 · Assigned by zdi

CVE-2023-42119Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability

Low 3.1

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 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.0)3.1Low
Exploit odds (30 days)1.6%top 24.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. 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 buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account. . Was ZDI-CAN-17643.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20exim4.96.2-r0ALPINE-CVE-2023-42119
Alpine:v3.21exim4.96.2-r0ALPINE-CVE-2023-42119
Alpine:v3.22exim4.96.2-r0ALPINE-CVE-2023-42119
Alpine:v3.23exim4.96.2-r0ALPINE-CVE-2023-42119
Alpine:v3.24exim4.96.2-r0ALPINE-CVE-2023-42119
Debian:12exim44.96-15+deb12u3DEBIAN-CVE-2023-42119
Debian:13exim44.97~RC2-2DEBIAN-CVE-2023-42119
Debian:14exim44.97~RC2-2DEBIAN-CVE-2023-42119
Ubuntu:22.04:LTSexim44.95-4ubuntu2.4UBUNTU-CVE-2023-42119
Ubuntu:22.04:LTSexim44.95-4ubuntu2.4USN-6455-1

Affected products (as reported)

VendorProductVersions
Exim Exim exim 4.96-RC0-14-24b8ed847-XX

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

References