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CVE-2023-42118

Published: May 3, 2024Updated: Aug 7, 2025 Sources: CVE List NVD BDUCWE-191
NVD MITRE
8.8CVSSHIGH
EPSS Score
51.5%
Top 1.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:AAttack Vector
Adjacent
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-191

Affected Products

Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
РОСА КобальтАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
eximGNU General Public LicenseOSS Libraries
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «нтц ит роса»commercialRUOperating Systems
gnu general public licenseoss-projectUSOSS Librariesaka gnu gpl, gpl
and 2 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
zerodayinitiative.com
https://www.cybersecurity-help.cz/vdb/SB2023092821
cybersecurity-help.cz
https://exim.org/static/doc/security/CVE-2023-zdi.txt
exim.org
and 13 more references View all →

Timeline

Published
May 3, 2024
Last Updated
Aug 7, 2025

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