CVE-2021-37618Public exploit

Process crash via unchecked ICC profile length

Published Aug 9, 2021 · Updated Aug 4, 2024

Out-of-bounds read in Exiv2 0.27.4 and earlier allows context-dependent attackers to crash the utility via a crafted JPEG 2000 file. Jp2Image::printStructure trusts an ICC length read from a JPEG 2000 color-header box and passes that length to output without checking it against the buffered box data. Exploitation requires a user or consuming application to process the file while requesting ICC-profile output with the -p C option, limiting the consequence to interruption of that Exiv2 process.

CVSS severity5.5
Medium
EPSS probability0.98%
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 read in Exiv2 0.27.4 and earlier allows context-dependent attackers to crash the utility via a crafted JPEG 2000 file. Jp2Image::printStructure trusts an ICC length read from a JPEG 2000 color-header box and passes that length to output without checking it against the buffered box data. Exploitation requires a user or consuming application to process the file while requesting ICC-profile output with the -p C option, limiting the consequence to interruption of that Exiv2 process.

The record

CVE
CVE-2021-37618
Published
Aug 9, 2021
Updated
Aug 4, 2024
Vendor
Exiv2
Product
Exiv2
Classifications
CWE-125, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 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?

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

  1. Affected versionversion=<= 0.27.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Exiv2 · Exiv2version=<= 0.27.4

Published CVSS scores

4.7GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
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 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-125Out-of-bounds Read
T1203Exploitation for Client Execution

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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