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CVE-2023-42115

Published: May 3, 2024Updated: Aug 7, 2025 Sources: CVE List NVD BDUCWE-787
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
10.0%
Top 5.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code 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 write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17434.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

eximexim
On-prem
Communications / email-server-client
EximExim
On-prem
Communications / email-server-client
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
eximGNU General Public LicenseOSS Libraries
eximoss-projectCommunications
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
gnu general public licenseoss-projectUSOSS Librariesaka gnu gpl, gpl
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://www.zerodayinitiative.com/advisories/ZDI-23-1469/
zerodayinitiative.com
https://git.exim.org/
git.exim.org
https://ftp.exim.org/pub/exim/exim4/
ftp.exim.org
and 5 more references View all →

Timeline

Published
May 3, 2024
Last Updated
Aug 7, 2025

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