Debian DLA-2659-1 : graphviz security update

high Nessus Plugin ID 149485
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Debian host is missing a security update.



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.


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:

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Upgrade the affected packages.

See Also

Plugin Details

Severity: High

ID: 149485

File Name: debian_DLA-2659.nasl

Version: 1.3

Type: local

Agent: unix

Published: 5/14/2021

Updated: 5/19/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-18032


Risk Factor: High

Score: 7.4


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:graphviz, p-cpe:/a:debian:debian_linux:graphviz-dev, p-cpe:/a:debian:debian_linux:graphviz-doc, p-cpe:/a:debian:debian_linux:libcdt5, p-cpe:/a:debian:debian_linux:libcgraph6, p-cpe:/a:debian:debian_linux:libgraphviz-dev, p-cpe:/a:debian:debian_linux:libgv-guile, p-cpe:/a:debian:debian_linux:libgv-lua, p-cpe:/a:debian:debian_linux:libgv-perl, p-cpe:/a:debian:debian_linux:libgv-python, p-cpe:/a:debian:debian_linux:libgv-ruby, p-cpe:/a:debian:debian_linux:libgv-tcl, p-cpe:/a:debian:debian_linux:libgvc6, p-cpe:/a:debian:debian_linux:libgvc6-plugins-gtk, p-cpe:/a:debian:debian_linux:libgvpr2, p-cpe:/a:debian:debian_linux:libpathplan4, p-cpe:/a:debian:debian_linux:libxdot4, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/13/2021

Vulnerability Publication Date: 5/30/2018

Reference Information

CVE: CVE-2018-10196, CVE-2020-18032