CVE-2023-51764
Postfix SMTP Smuggling Vulnerability
Description
Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). 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 Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required, such as the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9.
INFO
Published Date :
Dec. 24, 2023, 5:15 a.m.
Last Modified :
Nov. 21, 2024, 8:38 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2023-51764 has a 6 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-2023-51764
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-2023-51764.
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).
CVE-2023-51764 poc
Shell
just idea, no cp pls
Python
PoC CVE-2023-51764
cve
Python
Postfix SMTP Smuggling - Expect Script POC
Shell
None
Python Shell
Docker image for MarkLogic Server
database docker marklogic
Makefile Shell RobotFramework XQuery
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-51764 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-51764 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2023/12/24/1 Added Reference http://www.openwall.com/lists/oss-security/2023/12/25/1 Added Reference http://www.openwall.com/lists/oss-security/2024/05/09/3 Added Reference https://access.redhat.com/security/cve/CVE-2023-51764 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2255563 Added Reference https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html Added Reference https://github.com/duy-31/CVE-2023-51764 Added Reference https://github.com/eeenvik1/CVE-2023-51764 Added Reference https://lists.debian.org/debian-lts-announce/2024/01/msg00020.html Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/ Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/ Added Reference https://lwn.net/Articles/956533/ Added Reference https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ Added Reference https://www.openwall.com/lists/oss-security/2024/01/22/1 Added Reference https://www.postfix.org/announcements/postfix-3.8.5.html Added Reference https://www.postfix.org/smtp-smuggling.html Added Reference https://www.youtube.com/watch?v=V8KPV96g1To -
CVE Modified by [email protected]
Jun. 10, 2024
Action Type Old Value New Value Added Reference MITRE http://www.openwall.com/lists/oss-security/2024/05/09/3 [No types assigned] -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jan. 30, 2024
Action Type Old Value New Value Added Reference MITRE https://lists.debian.org/debian-lts-announce/2024/01/msg00020.html [No types assigned] -
CVE Modified by [email protected]
Jan. 22, 2024
Action Type Old Value New Value Changed Description Postfix through 3.8.4 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). 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 Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required: the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9. Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). 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 Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required, such as the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9. Added Reference MITRE https://www.openwall.com/lists/oss-security/2024/01/22/1 [No types assigned] Added Reference MITRE https://www.postfix.org/announcements/postfix-3.8.5.html [No types assigned] -
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. 11, 2024
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/ [No types assigned] -
CVE Modified by [email protected]
Jan. 11, 2024
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/ [No types assigned] -
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 https://access.redhat.com/security/cve/CVE-2023-51764 No Types Assigned https://access.redhat.com/security/cve/CVE-2023-51764 Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2255563 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2255563 Issue Tracking, 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/duy-31/CVE-2023-51764 No Types Assigned https://github.com/duy-31/CVE-2023-51764 Exploit, Third Party Advisory Changed Reference Type https://github.com/eeenvik1/CVE-2023-51764 No Types Assigned https://github.com/eeenvik1/CVE-2023-51764 Exploit, Third Party Advisory 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.postfix.org/smtp-smuggling.html No Types Assigned https://www.postfix.org/smtp-smuggling.html Exploit, Mitigation, Vendor 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:postfix:postfix:*:*:*:*:*:*:*:* versions up to (excluding) 3.5.23 *cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (excluding) 3.6.13 *cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:* versions from (including) 3.7.0 up to (excluding) 3.7.9 *cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:* versions from (including) 3.8.0 up to (excluding) 3.8.4 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* 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. 29, 2023
Action Type Old Value New Value Added Reference MITRE https://github.com/eeenvik1/CVE-2023-51764 [No types assigned] Added Reference MITRE https://github.com/duy-31/CVE-2023-51764 [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] -
CVE Modified by [email protected]
Dec. 26, 2023
Action Type Old Value New Value Changed Description Postfix through 3.8.4 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages that appear to originate from the Postfix server, allowing bypass of an SPF protection mechanism. This occurs because Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required: the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9. Postfix through 3.8.4 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). 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 Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required: the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9. Added Reference MITRE http://www.openwall.com/lists/oss-security/2023/12/25/1 [No types assigned] Added Reference MITRE https://bugzilla.redhat.com/show_bug.cgi?id=2255563 [No types assigned] Added Reference MITRE https://access.redhat.com/security/cve/CVE-2023-51764 [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 Postfix through 3.8.4 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages that appear to originate from the Postfix server, allowing bypass of an SPF protection mechanism. This occurs because Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required: the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9. Added Reference MITRE https://www.postfix.org/smtp-smuggling.html [No types assigned] Added Reference MITRE https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ [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-2023-51764 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-2023-51764
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
1.11 }} -0.31%
score
0.84271
percentile