CVE-2021-3443Public exploit

Application crash via invalid JP2 component reference

Published Mar 25, 2021 · Updated Aug 3, 2024

NULL pointer dereference in JasPer before 2.0.27 allows local users to crash an application by opening a crafted JP2 image. The jp2_decode function passes an invalid channel-to-component lookup entry to jas_image_setcmpttype, which writes through a missing component reference. Processing requires a user or consuming application to open the crafted file; the demonstrated consequence is a process crash without data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in JasPer before 2.0.27 allows local users to crash an application by opening a crafted JP2 image. The jp2_decode function passes an invalid channel-to-component lookup entry to jas_image_setcmpttype, which writes through a missing component reference. Processing requires a user or consuming application to open the crafted file; the demonstrated consequence is a process crash without data disclosure or modification.

The record

CVE
CVE-2021-3443
Published
Mar 25, 2021
Updated
Aug 3, 2024
Vendor
JasPer Software
Product
JasPer
Classifications
CWE-476, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

  1. Affected versionversion=jasper 2.0.27

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

JasPer Software · JasPerversion=jasper 2.0.27

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

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-476NULL Pointer Dereference
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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