CVE-2020-12268Network attack vector

Code execution via image compose integer overflow

Published Apr 27, 2020 · Updated Aug 4, 2024

Heap-based buffer overflow in Artifex jbig2dec before 0.18 allows remote attackers to execute code via crafted JBIG2 image data. The jbig2_image_compose function in jbig2_image.c performs unchecked integer arithmetic on image offsets and dimensions, allowing extreme values to wrap and drive out-of-bounds heap reads and writes. Exploitation requires an application or service to process attacker-supplied JBIG2 content; resulting impact can include process crashes or code execution with that application's privileges.

CVSS severity9.8
Critical
EPSS probability2.74%
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 Artifex jbig2dec before 0.18 allows remote attackers to execute code via crafted JBIG2 image data. The jbig2_image_compose function in jbig2_image.c performs unchecked integer arithmetic on image offsets and dimensions, allowing extreme values to wrap and drive out-of-bounds heap reads and writes. Exploitation requires an application or service to process attacker-supplied JBIG2 content; resulting impact can include process crashes or code execution with that application's privileges.

The record

CVE
CVE-2020-12268
Published
Apr 27, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 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

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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