CVE-2023-51747: SMTP smuggling in Apache James
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2023-51747?
CVE-2023-51747 is classified as a moderate severity vulnerability due to its potential for SMTP smuggling attacks.
How do I fix CVE-2023-51747?
To remediate CVE-2023-51747, upgrade Apache James to version 3.8.1 or 3.7.5.
What versions of Apache James are affected by CVE-2023-51747?
CVE-2023-51747 affects Apache James versions prior to 3.8.1 and 3.7.5.
What kind of attack can CVE-2023-51747 facilitate?
CVE-2023-51747 can facilitate SMTP smuggling attacks that exploit differences in line delimiter handling.
Is there a potential impact of CVE-2023-51747 on email security?
Yes, CVE-2023-51747 can allow attackers to forge SMTP envelopes, potentially compromising email security.