Debian 9 DLA-2659-1 Critical: Graphviz DoS and Buffer Overflow

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/source-package/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