CVE-2023-51765
CVE-2023-51765
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.3 · Medium · EPSS 1.1% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
sendmail Debian:12
- Versions
- 8.17.1.9-2
- Affected ranges
- ECOSYSTEM: < 8.17.1.9-2+deb12u1
Update to 8.17.1.9-2+deb12u1
sendmail Debian:13
- Affected ranges
- ECOSYSTEM: < 8.18.1-1
Update to 8.18.1-1
sendmail Debian:14
- Affected ranges
- ECOSYSTEM: < 8.18.1-1
Update to 8.18.1-1
sendmail Ubuntu:14.04:LTS
- Versions
- 8.14.4-2.1ubuntu4
- 8.14.4-2.1ubuntu5
- 8.14.4-4.1ubuntu1
- 8.14.4-4.1ubuntu1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sendmail Ubuntu:16.04:LTS
- Versions
- 8.14.9-4
- 8.15.2-2
- 8.15.2-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sendmail Ubuntu:18.04:LTS
- Versions
- 8.15.2-8ubuntu1
- 8.15.2-9ubuntu1
- 8.15.2-10
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sendmail Ubuntu:20.04:LTS
- Versions
- 8.15.2-13
- 8.15.2-17ubuntu1
- 8.15.2-18
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sendmail Ubuntu:22.04:LTS
- Versions
- 8.15.2-22ubuntu2
- 8.15.2-22ubuntu3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
- https://www.openwall.com/lists/oss-security/2023/12/22/7
- https://www.openwall.com/lists/oss-security/2023/12/21/7
- https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc
- http://www.openwall.com/lists/oss-security/2023/12/24/1
- http://www.openwall.com/lists/oss-security/2023/12/25/1
- https://bugzilla.suse.com/show_bug.cgi?id=1218351
- https://bugzilla.redhat.com/show_bug.cgi?id=2255869
- https://access.redhat.com/security/cve/CVE-2023-51765
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html
- 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/2023/12/30/3
- http://www.openwall.com/lists/oss-security/2023/12/30/1
- https://www.youtube.com/watch?v=V8KPV96g1To
- https://lwn.net/Articles/956533/
- https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-51765