Vulnerability Monitor

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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.

Published

2023-12-24T06:15:07.527

Last Modified

2024-11-21T08:38:44.980

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

Weaknesses

Type: Primary
CWE-345

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	sendmail	sendmail	< 8.18.0.2	Yes
Operating System	freebsd	freebsd	< 11.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	redhat	enterprise_linux	9.0	Yes

References

http://www.openwall.com/lists/oss-security/2023/12/24/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/12/25/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/12/26/5 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/12/29/5 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/12/30/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2023/12/30/3 Mailing List, Third Party Advisory ([email protected])
https://access.redhat.com/security/cve/CVE-2023-51765 Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=2255869 Issue Tracking, Third Party Advisory ([email protected])
https://bugzilla.suse.com/show_bug.cgi?id=1218351 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html Technical Description ([email protected])
https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc Patch ([email protected])
https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html ([email protected])
https://lwn.net/Articles/956533/ ([email protected])
https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ Technical Description, Third Party Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2023/12/21/7 Mailing List, Third Party Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2023/12/22/7 Mailing List, Third Party Advisory ([email protected])
https://www.youtube.com/watch?v=V8KPV96g1To Exploit ([email protected])
http://www.openwall.com/lists/oss-security/2023/12/24/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/12/25/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/12/26/5 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/12/29/5 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/12/30/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2023/12/30/3 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/security/cve/CVE-2023-51765 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=2255869 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.suse.com/show_bug.cgi?id=1218351 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html Technical Description (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc Patch (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html (af854a3a-2127-422b-91ae-364da2661108)
https://lwn.net/Articles/956533/ (af854a3a-2127-422b-91ae-364da2661108)
https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2023/12/21/7 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2023/12/22/7 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.youtube.com/watch?v=V8KPV96g1To Exploit (af854a3a-2127-422b-91ae-364da2661108)