Apache James prior to versions 3.8.1 and 3.7.5 is vulnerable to SMTP smuggling. A lenient behaviour in line delimiter handling might create a difference of interpretation between the sender and the receiver which can be exploited by an attacker to forge an SMTP envelop, allowing for instance to bypass SPF checks. The patch implies enforcement of CRLF as a line delimiter as part of the DATA transaction. We recommend James users to upgrade to non vulnerable versions.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
| Link | Tags |
|---|---|
| https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ | product related |
| https://postfix.org/smtp-smuggling.html | product related |
| https://lists.apache.org/thread/rxkwbkh9vgbl9rzx1fkllyk3krhgydko | vendor advisory mailing list |
| http://www.openwall.com/lists/oss-security/2024/02/27/4 | third party advisory mailing list |