The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3725 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3725-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     January 30, 2024                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : postfix     Version        : 3.4.23-0+deb10u2     CVE ID         : CVE-2023-51764     Debian Bug     : 1059230

    Postfix, a popular mail server,     allowed SMTP smuggling unless configured with     smtpd_data_restrictions=reject_unauth_pipelining     and smtpd_discard_ehlo_keywords=chunking     (or certain other options that exist in recent versions).

    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 Postfix supported <LF>.<CR><LF> but     some other popular e-mail servers do not.

    To prevent attack variants (by always disallowing <LF> without <CR>),     a different solution is required, such as setting the backported     configuration option smtpd_forbid_bare_newline=yes

    For Debian 10 buster, this problem has been fixed in version     3.4.23-0+deb10u2.

    We recommend that you upgrade your postfix packages.

    For the detailed security status of postfix please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/postfix

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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Debian dla-3725 : postfix - security update

medium Nessus Plugin ID 189772

Version 1.1

Version 1.0

Version 1.1 Jan 22, 2025, 5:44 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Plugin metadata Plugin Feed: 202501221744
Version 1.0 Jan 30, 2024, 7:07 PM New Plugin Feed: 202401301907