A debian-edu-config security update has been released for both Debian GNU/Linux 9 and 10

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Debian Security Advisory DSA-4589-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
December 18, 2019 https://www.debian.org/security/faq
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Package : debian-edu-config
CVE ID : CVE-2019-3467
Debian Bug : 946797

It was discovered that debian-edu-config, a set of configuration files
used for the Debian Edu blend, configured too permissive ACLs for the
Kerberos admin server, which allowed password changes for other user
principals.

For the oldstable distribution (stretch), this problem has been fixed
in version 1.929+deb9u4.

For the stable distribution (buster), this problem has been fixed in
version 2.10.65+deb10u3.

We recommend that you upgrade your debian-edu-config packages.

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

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/