Upstream information

CVE-2023-42118 at MITRE

Description

Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.
. Was ZDI-CAN-17578.

Upstream Security Advisories:

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having important severity.

CVSS v3 Scores
  CNA (ZDI) National Vulnerability Database
Base Score 7.5 8.8
Vector CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Adjacent Network Adjacent Network
Attack Complexity High Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3 3.1
SUSE Bugzilla entry: 1215788 [REOPENED]

No SUSE Security Announcements cross referenced.

SUSE Timeline for this CVE

CVE page created: Thu Sep 28 02:00:23 2023
CVE page last modified: Fri Aug 8 22:05:53 2025