CVE-2023-42119

Publication date 28 September 2023

Last updated 30 May 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.1 · Low

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
exim4 23.10 mantic
Fixed 4.96-17ubuntu2.1
23.04 lunar
Fixed 4.96-14ubuntu1.3
22.04 LTS jammy
Fixed 4.95-4ubuntu2.4
20.04 LTS focal
Fixed 4.93-13ubuntu1.9
18.04 LTS bionic
Fixed 4.90.1-1ubuntu1.10+esm2
16.04 LTS xenial
Fixed 4.86.2-2ubuntu2.6+esm5
14.04 LTS trusty
Fixed 4.82-3ubuntu2.4+esm7

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Notes

allenpthuang

fixes published, see ZDI’s note.

Severity score breakdown

Parameter Value
Base score 3.1 · Low
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N