CVE-2023-0803Public exploit

Utility crash via shifted-sample heap overwrite

Published Feb 13, 2023 · Updated Mar 21, 2025

Out-of-bounds write in LibTIFF tiffcrop 4.4.0 and earlier allows attackers to crash the utility with a crafted TIFF file. The extractContigSamplesShifted16bits routine writes a shifted 16-bit sample one byte beyond its allocated heap buffer while extracting crafted crop regions. Exploitation requires local invocation of tiffcrop with the malicious file and applicable region options, and the demonstrated consequence is process termination.

CVSS severity5.5
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in LibTIFF tiffcrop 4.4.0 and earlier allows attackers to crash the utility with a crafted TIFF file. The extractContigSamplesShifted16bits routine writes a shifted 16-bit sample one byte beyond its allocated heap buffer while extracting crafted crop regions. Exploitation requires local invocation of tiffcrop with the malicious file and applicable region options, and the demonstrated consequence is process termination.

The record

CVE
CVE-2023-0803
Published
Feb 13, 2023
Updated
Mar 21, 2025
Vendor
LibTIFF
Product
LibTIFF
Classifications
CWE-787, T1499.004, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<=4.4.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

LibTIFF · LibTIFFversion=<=4.4.0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499.004Application or System Exploitation
T1204.002Malicious 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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