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

DLA 2859-1: zziplib security update

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Debian LTS Advisory DLA-2859-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
December 28, 2021   https://wiki.debian.org/LTS
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Package : zziplib
Version : 0.13.62-3.2~deb9u2
CVE ID : CVE-2020-18442

An issue has been found in zziplib, a library providing read access on
ZIP-archive.
Because of mishandling a return value, an attacker might cause a denial of
service due to an infinite loop.

For Debian 9 stretch, this problem has been fixed in version
0.13.62-3.2~deb9u2.

We recommend that you upgrade your zziplib packages.

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

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