A tang security update has been released for Debian GNU/Linux 11 to address a flaw that could result in leak of private keys.

DSA 5025-1: tang security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-5025-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
December 19, 2021   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : tang
CVE ID : CVE-2021-4076

A flaw was discovered in tang, a network-based cryptographic binding
server, which could result in leak of private keys.

For the stable distribution (bullseye), this problem has been fixed in
version 8-3+deb11u1.

We recommend that you upgrade your tang packages.

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

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/