Improper Link Resolution Before File Access ('Link Following') vulnerability in yrutschle sslh.This issue affects sslh: before 2.2.2.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8360-1 advisory.

    It was discovered that sslh did not properly handle symbolic links when writing its PID file. A local     attacker could possibly use this issue to overwrite arbitrary files.

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

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Improper Link Resolution Before File Access ('Link Following') vulnerability in yrutschle sslh.This issue     affects sslh: before 2.2.2. (CVE-2025-52936)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 11 host has a package installed that is affected by a vulnerability as referenced in the dla-4238 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4238-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                           Chris Lamb     July 09, 2025                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : sslh     Version        : 1.20-1+deb11u1     CVE ID         : CVE-2025-52936     Debian Bug     : 1108284

    It was discovered that there was a so-called link following     vulnerability in sslh, a protocol multiplexor often used to share     SSH and HTTPS on the same port.

    For Debian 11 bullseye, this problem has been fixed in version     1.20-1+deb11u1.

    We recommend that you upgrade your sslh packages.

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

    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.

ID	Name	Product	Family	Severity
320485	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : sslh vulnerability (USN-8360-1)	Nessus	Ubuntu Local Security Checks	critical
255397	Linux Distros Unpatched Vulnerability : CVE-2025-52936	Nessus	Misc.	critical
241668	Debian dla-4238 : sslh - security update	Nessus	Debian Local Security Checks	critical

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