CVE-2023-51765
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
0.002 Low
EPSS
Percentile
54.7%
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
References
www.openwall.com/lists/oss-security/2023/12/24/1
www.openwall.com/lists/oss-security/2023/12/25/1
www.openwall.com/lists/oss-security/2023/12/26/5
www.openwall.com/lists/oss-security/2023/12/29/5
www.openwall.com/lists/oss-security/2023/12/30/1
www.openwall.com/lists/oss-security/2023/12/30/3
access.redhat.com/security/cve/CVE-2023-51765
bugzilla.redhat.com/show_bug.cgi?id=2255869
bugzilla.suse.com/show_bug.cgi?id=1218351
fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html
github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc
lists.debian.org/debian-lts-announce/2024/06/msg00004.html
lwn.net/Articles/956533/
sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
www.openwall.com/lists/oss-security/2023/12/21/7
www.openwall.com/lists/oss-security/2023/12/22/7
www.youtube.com/watch?v=V8KPV96g1To
Related
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
0.002 Low
EPSS
Percentile
54.7%