[SECURITY] [DLA 4238-1] sslh security update

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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
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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