The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4040 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4040-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/               Emilio Pozuelo Monfort     February 03, 2025                             https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : pam-u2f     Version        : 1.1.0-1.1+deb11u1     CVE ID         : CVE-2025-23013

    Matthias Gerstner reported that pam-u2f, a PAM module which allows to     use U2F (Universal 2nd Factor) devices in the PAM authentication stack,     does not properly handle PAM_IGNORE return values, allowing to bypass     the second factor or password-less login without inserting the proper     device.

    For Debian 11 bullseye, this problem has been fixed in version     1.1.0-1.1+deb11u1.

    We recommend that you upgrade your pam-u2f packages.

    For the detailed security status of pam-u2f please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/pam-u2f

    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-4040 : libpam-u2f - security update

high Nessus Plugin ID 214949

Version 1.1