The remote Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-5530 advisory.

    Several vulnerabilities were discovered in ruby-rack, a modular Ruby webserver interface, which may result     in denial of service and shell escape sequence injection. For the oldstable distribution (bullseye), these     problems have been fixed in version 2.1.4-3+deb11u1. We recommend that you upgrade your ruby-rack     packages. For the detailed security status of ruby-rack please refer to its security tracker page at:
    https://security-tracker.debian.org/tracker/ruby-rack

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

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

Detections

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Debian DSA-5530-1 : ruby-rack - security update

critical Nessus Plugin ID 183679

Version 1.1

Version 1.0

Version 1.1 Jan 24, 2025, 9:25 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Plugin metadata Plugin Feed: 202501242125
Version 1.0 Oct 23, 2023, 12:12 AM New Plugin Feed: 202310230012