A sniproxy security update has been released for Debian GNU/Linux 11 to address a bad handling of wildcard backend hosts in a crafted HTTP or TLS packet that might lead to remote arbitrary code execution.

DSA 5413-1: sniproxy security update

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Debian Security Advisory DSA-5413-1 security@debian.org
  https://www.debian.org/security/ Thorsten Alteholz
May 26, 2023   https://www.debian.org/security/faq
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Package : sniproxy
CVE ID : CVE-2023-25076
Debian Bug : 1033752

An issue has been found in sniproxy, a transparent TLS and HTTP layer 4
proxy with SNI support. Due to bad handling of wildcard backend hosts,
a crafted HTTP or TLS packet might lead to remote arbitrary code
execution.

For the stable distribution (bullseye), this problem has been fixed in
version 0.6.0-2+deb11u1.

We recommend that you upgrade your sniproxy packages.

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/