Detections
Analytics
CVE-2023-51765
medium
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.
References
https://www.openwall.com/lists/oss-security/2023/12/22/7
https://www.openwall.com/lists/oss-security/2023/12/21/7
https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
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
http://www.openwall.com/lists/oss-security/2023/12/30/3
http://www.openwall.com/lists/oss-security/2023/12/30/1
http://www.openwall.com/lists/oss-security/2023/12/29/5
http://www.openwall.com/lists/oss-security/2023/12/26/5