A graphviz security update has been released for Debian GNU/Linux 9 LTS a buffer overflow and NULL pointer dereference vulnerability.

DLA 2659-1: graphviz security update

- -----------------------------------------------------------------------
Debian LTS Advisory DLA-2659-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
May 13, 2021   https://wiki.debian.org/LTS
- -----------------------------------------------------------------------

Package : graphviz
Version : 2.38.0-17+deb9u1
CVE ID : CVE-2018-10196 CVE-2020-18032
Debian Bug : 898841 988000

CVE-2018-10196

NULL pointer dereference vulnerability in the rebuild_vlists
function in lib/dotgen/conc.c in the dotgen library allows
remote attackers to cause a denial of service (application
crash) via a crafted file.

CVE-2020-18032

A buffer overflow was discovered in Graphviz, which could
potentially result in the execution of arbitrary code when
processing a malformed file.

For Debian 9 stretch, these problems have been fixed in version
2.38.0-17+deb9u1.

We recommend that you upgrade your graphviz packages.

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

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