The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2899 advisory.

    The Qualys Research Labs discovered a local privilege escalation in PolicyKit's pkexec. Details can be     found in the Qualys advisory at https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt For Debian 9     stretch, this problem has been fixed in version 0.105-18+deb9u2. We recommend that you upgrade your     policykit-1 packages. For the detailed security status of policykit-1 please refer to its security tracker     page at: https://security-tracker.debian.org/tracker/policykit-1 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.

Detections

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Debian DLA-2899-1 : policykit-1 - LTS security update

high Nessus Plugin ID 157262

Version 1.10