CVE-2021-27845Public exploit

Application crash via unchecked rawsize divisor

Published Jul 15, 2021 · Updated Aug 3, 2024

Divide-by-zero in JasPer Image Coding Toolkit 2.0.0 through 2.0.16 allows local users to crash an application during encoding. The JPC encoder function cp_create divides the configured total size by cp->rawsize without first ensuring that rawsize is nonzero. Reachability requires user interaction with an input that drives rawsize to zero; the resulting fault interrupts only the consuming process.

CVSS severity5.5
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in JasPer Image Coding Toolkit 2.0.0 through 2.0.16 allows local users to crash an application during encoding. The JPC encoder function cp_create divides the configured total size by cp->rawsize without first ensuring that rawsize is nonzero. Reachability requires user interaction with an input that drives rawsize to zero; the resulting fault interrupts only the consuming process.

The record

CVE
CVE-2021-27845
Published
Jul 15, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-369
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 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?

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

5.5NVDCVSS: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 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-369Divide By Zero

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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