Vulnerability Report

CVE-2023-51765

Title: Sendmail

Other

Proof Of Concept

No public PoC currently indexed for CVE-2023-51765.

CWE Category CWE-345
Published Date Dec 24, 2023
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 5.3 CVSS v3.1
Exploit Probability (EPSS)
1.07%

Vulnerability Summary

CVE-2023-51765: 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.

Impacted Vendors

R
redhat 1
E
eric_allman 1
M
metainfo 1
S
sendmail 1

Reference Links

http://www.openwall.com/lists/oss-security/2023/12/24/1 http://www.openwall.com/lists/oss-security/2023/12/25/1 http://www.openwall.com/lists/oss-security/2023/12/26/5 http://www.openwall.com/lists/oss-security/2023/12/29/5 http://www.openwall.com/lists/oss-security/2023/12/30/1 http://www.openwall.com/lists/oss-security/2023/12/30/3 https://access.redhat.com/security/cve/CVE-2023-51765 https://bugzilla.redhat.com/show_bug.cgi?id=2255869 https://bugzilla.suse.com/show_bug.cgi?id=1218351 https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html https://lwn.net/Articles/956533/ https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ https://www.openwall.com/lists/oss-security/2023/12/21/7 https://www.openwall.com/lists/oss-security/2023/12/22/7 https://www.youtube.com/watch?v=V8KPV96g1To http://www.openwall.com/lists/oss-security/2023/12/24/1 http://www.openwall.com/lists/oss-security/2023/12/25/1 http://www.openwall.com/lists/oss-security/2023/12/26/5 http://www.openwall.com/lists/oss-security/2023/12/29/5 http://www.openwall.com/lists/oss-security/2023/12/30/1 http://www.openwall.com/lists/oss-security/2023/12/30/3 https://access.redhat.com/security/cve/CVE-2023-51765 https://bugzilla.redhat.com/show_bug.cgi?id=2255869 https://bugzilla.suse.com/show_bug.cgi?id=1218351 https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html https://lwn.net/Articles/956533/ https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ https://www.openwall.com/lists/oss-security/2023/12/21/7 https://www.openwall.com/lists/oss-security/2023/12/22/7 https://www.youtube.com/watch?v=V8KPV96g1To
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-51765 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Stack

No specific products linked.