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CVE-2023-51765

Published: Dec 24, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-345
5.3MEDIUM
NVD MITRE
EPSS Score
1.1%
Top 38.0%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Self-Check
OpenVAS

Description

sendmail through 8.17.2 allows SMTP smuggling in certain configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because sendmail supports <LF>.<CR><LF> but some other popular e-mail servers do not. This is resolved in 8.18 and later versions with 'o' in srv_features.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-345

Affected Products

sendmail
oss-projectaka advanced message server, sendmail switch
sendmailOn-prem
Communications / email-server-client
freebsd
oss-project·US
freebsdOn-premOS
Operating Systems / unix-bsd
Red Hat Inc.
commercial·USaka redhat, red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Sendmail Inc.
commercial·USaka sendmail smtp server
SendMail SMTP ServerOn-prem
Communications / email-server-client
FreeBSD Project
oss-project·USaka freebsd
FreeBSDOn-premOS
Operating Systems / unix-bsd
and 2 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
sec-consult.com
https://www.openwall.com/lists/oss-security/2023/12/22/7
openwall.com
https://www.openwall.com/lists/oss-security/2023/12/21/7
openwall.com
and 17 more references View all →

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