CVE-2023-51765
Sendmail SMTP Smuggling Vulnerability
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.
INFO
Published Date :
Dec. 24, 2023, 6:15 a.m.
Last Modified :
June 15, 2024, 9:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2023-51765 has a 3 public PoC/Exploit
available at Github.
Go to the Public Exploits
tab to see the list.
Affected Products
The following products are affected by CVE-2023-51765
vulnerability.
Even if cvefeed.io
is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-51765
.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
PoC CVE-2023-51764
cve
Python
None
Python Shell
qmail is a secure, reliable, efficient, simple message transfer agent.
qmail dkim smtp spf srs tls mailserver
Makefile Roff C Shell GAP C++ HTML
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-51765
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-51765
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jun. 15, 2024
Action Type Old Value New Value Added Reference MITRE https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html [No types assigned] -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jan. 18, 2024
Action Type Old Value New Value Added Reference MITRE https://lwn.net/Articles/956533/ [No types assigned] -
CVE Modified by [email protected]
Jan. 09, 2024
Action Type Old Value New Value Changed Description sendmail through at least 8.14.7 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. 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. -
Initial Analysis by [email protected]
Jan. 05, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Changed Reference Type http://www.openwall.com/lists/oss-security/2023/12/24/1 No Types Assigned http://www.openwall.com/lists/oss-security/2023/12/24/1 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/12/25/1 No Types Assigned http://www.openwall.com/lists/oss-security/2023/12/25/1 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/12/26/5 No Types Assigned http://www.openwall.com/lists/oss-security/2023/12/26/5 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/12/29/5 No Types Assigned http://www.openwall.com/lists/oss-security/2023/12/29/5 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/12/30/1 No Types Assigned http://www.openwall.com/lists/oss-security/2023/12/30/1 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/12/30/3 No Types Assigned http://www.openwall.com/lists/oss-security/2023/12/30/3 Mailing List, Third Party Advisory Changed Reference Type https://access.redhat.com/security/cve/CVE-2023-51765 No Types Assigned https://access.redhat.com/security/cve/CVE-2023-51765 Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2255869 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2255869 Issue Tracking, Third Party Advisory Changed Reference Type https://bugzilla.suse.com/show_bug.cgi?id=1218351 No Types Assigned https://bugzilla.suse.com/show_bug.cgi?id=1218351 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html No Types Assigned https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html Technical Description Changed Reference Type https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc No Types Assigned https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc Patch Changed Reference Type https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ No Types Assigned https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ Technical Description, Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2023/12/21/7 No Types Assigned https://www.openwall.com/lists/oss-security/2023/12/21/7 Mailing List, Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2023/12/22/7 No Types Assigned https://www.openwall.com/lists/oss-security/2023/12/22/7 Mailing List, Third Party Advisory Changed Reference Type https://www.youtube.com/watch?v=V8KPV96g1To No Types Assigned https://www.youtube.com/watch?v=V8KPV96g1To Exploit Added CWE NIST CWE-345 Added CPE Configuration OR *cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:* versions up to (excluding) 8.18.0.2 Added CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* versions up to (excluding) 11.0 Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 04, 2024
Action Type Old Value New Value Added Reference MITRE https://www.youtube.com/watch?v=V8KPV96g1To [No types assigned] -
CVE Modified by [email protected]
Dec. 30, 2023
Action Type Old Value New Value Added Reference MITRE http://www.openwall.com/lists/oss-security/2023/12/30/3 [No types assigned] Added Reference MITRE http://www.openwall.com/lists/oss-security/2023/12/30/1 [No types assigned] -
CVE Modified by [email protected]
Dec. 30, 2023
Action Type Old Value New Value Added Reference MITRE http://www.openwall.com/lists/oss-security/2023/12/29/5 [No types assigned] -
CVE Modified by [email protected]
Dec. 26, 2023
Action Type Old Value New Value Added Reference MITRE https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html [No types assigned] Added Reference MITRE http://www.openwall.com/lists/oss-security/2023/12/26/5 [No types assigned] -
CVE Modified by [email protected]
Dec. 26, 2023
Action Type Old Value New Value Changed Description sendmail through at least 8.14.7 allows SMTP smuggling in certain configurations. Remote attackers can use a published exploitation technique to inject e-mail messages that appear to originate from the sendmail server, allowing bypass of an SPF protection mechanism. This occurs because sendmail supports <LF>.<CR><LF> but some other popular e-mail servers do not. sendmail through at least 8.14.7 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. Added Reference MITRE http://www.openwall.com/lists/oss-security/2023/12/25/1 [No types assigned] Added Reference MITRE https://bugzilla.suse.com/show_bug.cgi?id=1218351 [No types assigned] Added Reference MITRE https://bugzilla.redhat.com/show_bug.cgi?id=2255869 [No types assigned] Added Reference MITRE https://access.redhat.com/security/cve/CVE-2023-51765 [No types assigned] -
CVE Modified by [email protected]
Dec. 24, 2023
Action Type Old Value New Value Added Reference MITRE http://www.openwall.com/lists/oss-security/2023/12/24/1 [No types assigned] -
CVE Received by [email protected]
Dec. 24, 2023
Action Type Old Value New Value Added Description sendmail through at least 8.14.7 allows SMTP smuggling in certain configurations. Remote attackers can use a published exploitation technique to inject e-mail messages that appear to originate from the sendmail server, allowing bypass of an SPF protection mechanism. This occurs because sendmail supports <LF>.<CR><LF> but some other popular e-mail servers do not. Added Reference MITRE https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ [No types assigned] Added Reference MITRE https://www.openwall.com/lists/oss-security/2023/12/22/7 [No types assigned] Added Reference MITRE https://www.openwall.com/lists/oss-security/2023/12/21/7 [No types assigned] Added Reference MITRE https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-51765
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-51765
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.21 }} 0.04%
score
0.59683
percentile