A smarty3 security update has been released for Debian GNU/Linux 9 LTS to address several vulnerabilities in the smarty3 template engine for PHP.

DLA 2618-1: smarty3 security update

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Debian LTS Advisory DLA-2618-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Abhijith PA
April 05, 2021   https://wiki.debian.org/LTS
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Package : smarty3
Version : 3.1.31+20161214.1.c7d42e4+selfpack1-2+deb9u2
CVE ID : CVE-2018-13982 CVE-2021-26119 CVE-2021-26120

Several vulnerabilities were discovered in smarty3, a template engine
for PHP.

CVE-2018-13982

path traversal vulnerability due to insufficient sanitization of
code in Smarty templates. This allows attackers controlling the
Smarty template to bypass the trusted directory security
restriction and read arbitrary files.

CVE-2021-26119

allows a Sandbox Escape because $smarty.template_object can be
accessed in sandbox mode.

CVE-2021-26120

allows code injection vulnerability via an unexpected function
name after a {function name= substring.

For Debian 9 stretch, these problems have been fixed in version
3.1.31+20161214.1.c7d42e4+selfpack1-2+deb9u2.

We recommend that you upgrade your smarty3 packages.

For the detailed security status of smarty3 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/smarty3

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