What’s Vulnerable › Vulnerabilities

CVE-2020-18032

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-29 · updated 2026-06-17
• Weakness: CWE-120

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.

Affected products

• Debian Linux: 9.0, 10.0
• Fedoraproject Fedora: 33, 34
• Graphviz: before 2.46.0 — fixed in 2.46.0

How to fix

Upgrade to a fixed version: Graphviz 2.46.0. Check the vendor advisory for mitigations.

References

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

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