A json-c security update has been released for Debian GNU/Linux 9 LTS to address an integer overflow issue in JSON-C.

DLA 2301-1: json-c security update

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Debian LTS Advisory DLA-2301-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
July 30, 2020   https://wiki.debian.org/LTS
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Package : json-c
Version : 0.12.1-1.1+deb9u1
CVE ID : CVE-2020-12762
Debian Bug : 960326

Tobias Stoeckmann found an integer overflow issue in JSON-C, a C
library to manipulate JSON objects, when reading maliciously crafted
large files. The issue could be exploited to cause denial of service
or possibly execute arbitrary code.

For Debian 9 stretch, this problem has been fixed in version
0.12.1-1.1+deb9u1.

We recommend that you upgrade your json-c packages.

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

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