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 . but some other popular e-mail servers do not. This is resolved in 8.18 and later versions with o in srv_features.
Weakness
The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Sendmail | Sendmail | * | 8.18.0.2 (excluding) |
| Sendmail | Ubuntu | bionic | * |
| Sendmail | Ubuntu | focal | * |
| Sendmail | Ubuntu | lunar | * |
| Sendmail | Ubuntu | mantic | * |
| Sendmail | Ubuntu | trusty | * |
| Sendmail | Ubuntu | trusty/esm | * |
| Sendmail | Ubuntu | upstream | * |
| Sendmail | Ubuntu | xenial | * |
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/111.html
- https://cwe.mitre.org/data/definitions/141.html
- https://cwe.mitre.org/data/definitions/142.html
- https://cwe.mitre.org/data/definitions/148.html
- https://cwe.mitre.org/data/definitions/218.html
- https://cwe.mitre.org/data/definitions/384.html
- https://cwe.mitre.org/data/definitions/385.html
- https://cwe.mitre.org/data/definitions/386.html
- https://cwe.mitre.org/data/definitions/387.html
- https://cwe.mitre.org/data/definitions/388.html
- https://cwe.mitre.org/data/definitions/665.html
- https://cwe.mitre.org/data/definitions/701.html
References
- 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