HOMEVULNERABILITIESCVE-2020-18032
HIGH

CVE-2020-18032

CWE-120Published: April 29, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-18032 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
graphviz1 product(s)
graphviz
Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://gitlab.com/graphviz/graphviz/-/issues/1700
PATCHhttps://gitlab.com/graphviz/graphviz/-/issues/1700
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/05/msg00014.html
ADVISORYhttps://security.gentoo.org/glsa/202107-04
ADVISORYhttps://www.debian.org/security/2021/dsa-4914
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/05/msg00014.html
ADVISORYhttps://security.gentoo.org/glsa/202107-04
ADVISORYhttps://www.debian.org/security/2021/dsa-4914

All References (12)

→
https://gitlab.com/graphviz/graphviz/-/issues/1700Exploit · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/05/msg00014.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5PQPHJHPU46FK3R5XBP3XDT4X37HMPC/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGY2IGARE6RZHTF2UEZEWLMQCDILFK6A/
→
https://security.gentoo.org/glsa/202107-04Issue Tracking · Third Party Advisory
→
https://www.debian.org/security/2021/dsa-4914Third Party Advisory
→
https://gitlab.com/graphviz/graphviz/-/issues/1700Exploit · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/05/msg00014.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5PQPHJHPU46FK3R5XBP3XDT4X37HMPC/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGY2IGARE6RZHTF2UEZEWLMQCDILFK6A/
→
https://security.gentoo.org/glsa/202107-04Issue Tracking · Third Party Advisory
→
https://www.debian.org/security/2021/dsa-4914Third Party Advisory

Quick Facts

CVE IDCVE-2020-18032
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-120
CISA KEVNo
Affected3 vendor(s)
PublishedApr 29, 2021

Related CVEs (CWE-120)

CVE-2010-10016
10.0
CVE-2011-4862
10.0
CVE-2001-0191
10.0
CVE-2022-22570
10.0
CVE-2023-4260
10.0
CVE-1999-0046
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-18032 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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