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CVE-2023-42117

Published: May 3, 2024Updated: Nov 3, 2025 Sources: CVE List NVD BDUCWE-138
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
5.7%
Top 8.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Exim Improper Neutralization of Special Elements 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 memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554.

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-138

Affected Products

eximexim
On-prem
Communications / email-server-client
EximExim
On-prem
Communications / email-server-client
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
Astra Linux Special Edition для «Эльбрус»ООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
eximoss-projectCommunications
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 3 more affected products View all →

Exploitability

Official Patch Available

References

https://www.zerodayinitiative.com/advisories/ZDI-23-1471/
zerodayinitiative.com
https://lists.debian.org/debian-lts-announce/2024/10/msg00029.html
lists.debian.org
https://www.zerodayinitiative.com/advisories/ZDI-23-1471/
zerodayinitiative.com
and 13 more references View all →

Timeline

Published
May 3, 2024
Last Updated
Nov 3, 2025

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