CVE-2023-51747

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    CVE-2023-51747

    Published: 27 Feb 2024Last Modified: 12 Aug 2026

    Summary: SMTP smuggling in Apache James

    Details: 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.

    References: http://www.openwall.com/lists/oss-security/2024/02/27/4, https://postfix.org/smtp-smuggling.html, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/51xxx/CVE-2023-51747.json, https://lists.apache.org/thread/rxkwbkh9vgbl9rzx1fkllyk3krhgydko, https://nvd.nist.gov/vuln/detail/CVE-2023-51747, https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 795028ac33df5ca103cf7d34fbead907a62ce197
    Fixed -None

    Affected versions

    3.7.5

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2023-51747 | CVE-DB