A salt security update has been released for Debian GNU/Linux 9 LTS.

DLA 2815-1: salt security update

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Debian LTS Advisory DLA-2815-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Markus Koschany
November 10, 2021   https://wiki.debian.org/LTS
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Package : salt
Version : 2016.11.2+ds-1+deb9u7
CVE ID : CVE-2020-28243 CVE-2020-28972 CVE-2020-35662 CVE-2021-3144
CVE-2021-3148 CVE-2021-3197 CVE-2021-25281 CVE-2021-25282
CVE-2021-25283 CVE-2021-25284 CVE-2021-31607
Debian Bug : 987496 987496

Multiple security vulnerabilities have been discovered in Salt, a powerful
remote execution manager, that allow for local privilege escalation on a
minion, server side template injection attacks, insufficient checks for
eauth credentials, shell and command injections or incorrect validation of
SSL certificates.

For Debian 9 stretch, these problems have been fixed in version
2016.11.2+ds-1+deb9u7.

We recommend that you upgrade your salt packages.

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

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