A monit security update has been released for Debian GNU/Linux 9 LTS to address two vulnerabilities.

DLA 2855-1: monit security update

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Debian LTS Advisory DLA-2855-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Adrian Bunk
December 27, 2021   https://wiki.debian.org/LTS
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Package : monit
Version : 1:5.20.0-6+deb9u2
CVE ID : CVE-2019-11454 CVE-2019-11455
Debian Bug : 927775

Two vulnerabilities were fixed in monit, a utility for monitoring and
managing Unix systems.

CVE-2019-11454

Persistent cross-site scripting in http/cervlet.c

CVE-2019-11455

Buffer over-read in Util_urlDecode in util.c

For Debian 9 stretch, these problems have been fixed in version
1:5.20.0-6+deb9u2.

We recommend that you upgrade your monit packages.

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

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