A php7.0 security update has been released for Debian GNU/Linux 9 LTS to address a use-after-free vulnerability when parsing PHAR files.

DLA 2345-1: php7.0 security update

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Debian LTS Advisory DLA-2345-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Chris Lamb
August 26, 2020   https://wiki.debian.org/LTS
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Package : php7.0
Version : 7.0.33-0+deb9u9
CVE ID : CVE-2020-7068

It was discovered that there was a use-after-free vulnerability when
parsing PHAR files, a method of putting entire PHP applications into
a single file.

For Debian 9 "Stretch", this problem has been fixed in version
7.0.33-0+deb9u9.

We recommend that you upgrade your php7.0 packages.

For the detailed security status of php7.0 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/php7.0

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