The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3829 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3829-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     June 15, 2024                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : sendmail     Version        : 8.15.2-14~deb10u2     CVE ID         : CVE-2023-51765     Debian Bug     : 1059386

    sendmail allowed 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 particular injection vulnerability has been closed,     unfortunatly full closure need to reject mail that     contain NUL (0x00 byte).

    This is slighly non conformant with RFC and could     be opt-out by setting confREJECT_NUL to 'false'     in sendmail.mc file.

    For Debian 10 buster, this problem has been fixed in version     8.15.2-14~deb10u2.

    We recommend that you upgrade your sendmail packages.

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

    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-3829 : libmilter-dev - security update

medium Nessus Plugin ID 200639

Version 1.1