CVEvulnerability
CVE-2023-51765
5.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2023-12-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-345
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.
Affected configurations
• sendmail sendmail (< 8.18.0.2)
• freebsd freebsd (< 11.0)
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
Related
Weakness · CWE (1)
- CWE-345 Insufficient Verification of Data Authenticity weakness
References
- http://www.openwall.com/lists/oss-security/2023/12/24/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/25/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/26/5 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/29/5 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/3 Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-51765 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2255869 Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1218351 Issue Tracking, Patch, Third Party Advisory
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html Technical Description
- https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc Patch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html lists.debian.org
- https://lwn.net/Articles/956533/ lwn.net
- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ Technical Description, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/21/7 Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/22/7 Mailing List, Third Party Advisory
- https://www.youtube.com/watch?v=V8KPV96g1To Exploit
- http://www.openwall.com/lists/oss-security/2023/12/24/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/25/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/26/5 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/29/5 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/3 Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-51765 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2255869 Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1218351 Issue Tracking, Patch, Third Party Advisory
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html Technical Description
- https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc Patch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html lists.debian.org
- https://lwn.net/Articles/956533/ lwn.net
- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ Technical Description, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/21/7 Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/22/7 Mailing List, Third Party Advisory
- https://www.youtube.com/watch?v=V8KPV96g1To Exploit