An elog security update has been released for Debian GNU/Linux 9 LTS to address a denial of service issue.

DLA 3014-1: elog security update

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Debian LTS Advisory DLA-3014-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
May 18, 2022   https://wiki.debian.org/LTS
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Package : elog
Version : 3.1.2-1-1+deb9u1
CVE ID : CVE-2020-8659

A vulnerability was reported in src:elog, a logbook system to manage
notes through a Web interface. This vulnerability allows remote
attackers to create a denial-of-service condition on affected
installations of ELOG Electronic Logbook. Authentication is not
required to exploit this vulnerability. The specific flaw exists
within the processing of HTTP parameters. A crafted request can
trigger the dereference of a null pointer. An attacker can leverage
this vulnerability to create a denial-of-service condition.

For Debian 9 stretch, this problem has been fixed in version
3.1.2-1-1+deb9u1.

We recommend that you upgrade your elog packages.

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

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