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No exploitation reportedFix available

CVE-2020-18032

No exploitation reported by the sources we read.

  • Published2021-04-29
  • Fixed in2.46.0
  • WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Buffer Overflow in Graphviz Graph Visualization Tools from commit ID f8b9e035 and earlier allows remote attackers to execute arbitrary code or cause a denial of service (application crash) by loading a crafted file into the "lib/common/shapes.c" component.

Timeline

dates in UTC
  1. 2021-04-2918:15CVE publishedNVD

Versions per branch

NVD
Graphviz
BranchAffectedFixed in
2.46< 2.46.02.46.0
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
33.x= 33no fix published
34.x= 34no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • graphvizUbuntu:Pro:20.04:LTSall versions · fixed in 2.42.2-3ubuntu0.1~esm1
  • graphvizUbuntu:Pro:18.04:LTSall versions · fixed in 2.40.1-2ubuntu0.1~esm1
  • graphvizUbuntu:Pro:16.04:LTSall versions · fixed in 2.38.0-12ubuntu2.1+esm1
  • graphvizUbuntu:Pro:14.04:LTSall versions · fixed in 2.36.0-0ubuntu3.2+esm1
  • graphvizSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 2.28.0-29.6.1and 1 other package
  • graphvizSUSE:OpenStack Cloud Crowbar 8all versions · fixed in 2.28.0-29.6.1and 1 other package
  • graphvizSUSE:OpenStack Cloud 9all versions · fixed in 2.28.0-29.6.1and 1 other package
  • graphvizSUSE:OpenStack Cloud 8all versions · fixed in 2.28.0-29.6.1and 1 other package

71 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-18032 Red Hat Product Security158 products fixed · 27 known affected

    graphviz: off-by-one in parse_reclbl() in lib/common/shapes.c

    graphviz as a component of Red Hat Enterprise Linux 6 · graphviz-devel as a component of Red Hat Enterprise Linux 6 · graphviz-doc as a component of Red Hat Enterprise Linux 6 · +24 more

  • RHSA-2021:4256 Red Hat Product Security134 products fixed

    Red Hat Security Advisory: graphviz security update

Full record on NVD

Fix

  1. Update Graphviz to 2.46.0
  2. Vendor fix Red Hat Product Security RHSA-2021:4256 · 134 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. No fix planned, says the vendor Red Hat Product Security CVE-2020-18032 · 27 productsOut of support scope

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-04-29
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-92qh-4rf3-8x2m

Frequently asked questions

What is CVE-2020-18032?

Buffer Overflow in Graphviz Graph Visualization Tools from commit ID f8b9e035 and earlier allows remote attackers to execute arbitrary code or cause a denial of service (application crash) by loading a crafted file into the "lib/common/shapes.c" component.

Is CVE-2020-18032 actively exploited?

Active exploitation of CVE-2020-18032 has not been confirmed. Its EPSS score was 2.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-18032?

CVE-2020-18032 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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