VulnerabilityModified
CVE-2023-51765
sendmail through 8.17.2 allows SMTP smuggling in certain configurations.
MEDIUM 5.3EPSS 1.08%
Does this matter?
Lower severity and a low EPSS score (1.08%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 1.08% probability · 63th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-345
- Affected
- sendmail/sendmail · freebsd/freebsd · redhat/enterprise linux
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2023/12/24/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/25/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/26/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/29/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/3Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-51765Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2255869Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1218351Issue Tracking, Patch, Third Party Advisory
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.htmlTechnical Description
- https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935ccPatch
- 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/Technical Description, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/21/7Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/22/7Mailing List, Third Party Advisory
- https://www.youtube.com/watch?v=V8KPV96g1ToExploit
- http://www.openwall.com/lists/oss-security/2023/12/24/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/25/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/26/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/29/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/3Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-51765Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2255869Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1218351Issue Tracking, Patch, Third Party Advisory
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.htmlTechnical Description
- https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935ccPatch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html
- https://lwn.net/Articles/956533/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.