CVE-2020-12672Public exploitNetwork attack vector

Service crash via single-dimension MNG magnification

Published May 6, 2020 · Updated Aug 4, 2024

Heap-based buffer overflow in GraphicsMagick 1.3.35 and earlier allows remote attackers to crash image-processing services via a crafted MNG file. ReadMNGImage applies MAGN interpolation to one-pixel-wide or one-pixel-high images instead of pixel replication, causing an out-of-bounds heap write. Exploitation requires an untrusted MNG image to reach the decoder, and the grounded consequence is a process crash rather than disclosed code execution.

CVSS severity7.5
High
EPSS probability2.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in GraphicsMagick 1.3.35 and earlier allows remote attackers to crash image-processing services via a crafted MNG file. ReadMNGImage applies MAGN interpolation to one-pixel-wide or one-pixel-high images instead of pixel replication, causing an out-of-bounds heap write. Exploitation requires an untrusted MNG image to reach the decoder, and the grounded consequence is a process crash rather than disclosed code execution.

The record

CVE
CVE-2020-12672
Published
May 6, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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