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Fencer Vulns
high 7.5

CVE-2020-12672 json

GraphicsMagick through 1.3.35 has a heap-based buffer overflow in ReadMNGImage in coders/png.c.

published 2020-05-06 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4968

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

GraphicsMagick through 1.3.35 has a heap-based buffer overflow in ReadMNGImage in coders/png.c.

Patch / fix

  • graphicsmagick Debian 14, Debian 13, Debian 12 1.4+really1.3.35-2

debian advisories DEBIAN-CVE-2020-12672

  • graphicsmagick Ubuntu 20.04 LTS 1.4+really1.3.35-1ubuntu0.1
  • graphicsmagick Ubuntu Pro 14.04 LTS 1.3.18-1ubuntu3.1+esm7
  • graphicsmagick Ubuntu Pro 16.04 LTS 1.3.23-1ubuntu0.6+esm1
  • graphicsmagick Ubuntu Pro 18.04 LTS 1.3.28-2ubuntu0.1+esm1
  • graphicsmagick Ubuntu Pro 20.04 LTS 1.4+really1.3.35-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-12672

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • GraphicsMagick openSUSE Tumbleweed 1.3.36-1.7
  • GraphicsMagick Package Hub 15 SP1 1.3.29-bp151.5.15.1
  • GraphicsMagick openSUSE Leap 15.1 1.3.29-lp151.4.20.1

opensuse advisories openSUSE-SU-2024:10596-1openSUSE-SU-2020:0788-1openSUSE-SU-2020:0779-1

  • graphicsmagick Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 1.3.35-r2

alpine advisories ALPINE-CVE-2020-12672

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-12672 updated cvss 7.5

graphicsmagick: a heap-based buffer overflow in ReadMNGImage in coders/png.c

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.92% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.chromium.org https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19025 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.