Home > Vulnerability Database > CVE-2023-51765

Mend.io Vulnerability Database

CVE-2023-51765

Date: December 23, 2023

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.

Severity Score

5.3

Related Resources (20)

Url: https://www.youtube.com/watch?v=V8KPV96g1To

Url: https://bugzilla.suse.com/show_bug.cgi?id=1218351

Url: https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html

Url: https://www.openwall.com/lists/oss-security/2023/12/22/7

Url: https://www.openwall.com/lists/oss-security/2023/12/21/7

Url: https://access.redhat.com/security/cve/CVE-2023-51765

Url: https://bugzilla.redhat.com/show_bug.cgi?id=2255869

Url: http://www.openwall.com/lists/oss-security/2023/12/26/5

Url: https://lwn.net/Articles/956533/

Url: http://www.openwall.com/lists/oss-security/2023/12/29/5

Url: https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/

Url: https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html

Url: https://nvd.nist.gov/vuln/detail/CVE-2023-51765

Url: http://www.openwall.com/lists/oss-security/2023/12/25/1

Url: http://www.openwall.com/lists/oss-security/2023/12/24/1

Url: http://www.openwall.com/lists/oss-security/2023/12/30/1

Url: https://security-tracker.debian.org/tracker/CVE-2023-51765

Url: https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc

Url: http://www.openwall.com/lists/oss-security/2023/12/30/3

Url: https://www.mend.io/vulnerability-database/CVE-2023-51765

Severity Score

5.3

Weakness Type (CWE)

Insufficient Verification of Data Authenticity

CWE-345

CVSS v3.1

Base Score:	5.3
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	LOW
Availability (A):	NONE

Mend.io Vulnerability Database

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CVE-2023-51765

Date: December 23, 2023

Severity Score

Related Resources (20)

Severity Score

Weakness Type (CWE)

CVSS v3.1

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