CVE-2020-19131Public exploit

Process crash via invertImage loop overrun

Published Sep 7, 2021 · Updated Aug 4, 2024

Heap buffer overrun in LibTIFF 4.0.10 tiffcrop allows context-dependent attackers to crash the utility via a crafted TIFF image. The invertImage() loop processes too many bytes for 2- and 4-bit samples because its column counter fails to advance by the number of pixels packed into each byte. Exploitation requires tiffcrop to process the file with color inversion enabled; the documented outcome is an out-of-bounds read and process crash.

CVSS severity7.5
High
EPSS probability2.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overrun in LibTIFF 4.0.10 tiffcrop allows context-dependent attackers to crash the utility via a crafted TIFF image. The invertImage() loop processes too many bytes for 2- and 4-bit samples because its column counter fails to advance by the number of pixels packed into each byte. Exploitation requires tiffcrop to process the file with color inversion enabled; the documented outcome is an out-of-bounds read and process crash.

The record

CVE
CVE-2020-19131
Published
Sep 7, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 7, 2021CVE 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 vectorlocal
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
5.5SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS: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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

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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