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CVE-2023-51765

Published: Dec 24, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-345
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
1.1%
Top 39.5%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

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
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Weaknesses

CWE-345

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
SendMail SMTP ServerSendmail Inc.
On-prem
Communications / email-server-client
FreeBSDFreeBSD Project
On-premOS
Operating Systems / unix-bsd
sendmailsendmail
On-prem
Communications / email-server-client
red hat inc.commercialUSOperating Systemsaka red hat
ооо «ред софт»commercialRUOperating Systemsaka red soft
sendmail inc.commercialUSCommunicationsaka sendmail smtp server
freebsd projectoss-projectUSOperating Systemsaka freebsd
sendmailoss-projectCommunicationsaka sendmail switch, advanced message server
and 3 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

1 exploit source identified

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

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

http://www.openwall.com/lists/oss-security/2023/12/24/1
openwall.com
https://www.openwall.com/lists/oss-security/2023/12/21/7
openwall.com
https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
sec-consult.com
and 17 more references View all →

Timeline

Published
Dec 24, 2023
Last Updated
Nov 21, 2024

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