CVE-2021-37615Public exploit

Process crash via unchecked metadata iterator dereference

Published Aug 9, 2021 · Updated Aug 4, 2024

Null pointer dereference in Exiv2 0.27.4 and earlier allows local users to crash the utility via a crafted image. During interpreted metadata printing, Exiv2::Internal::resolveLens0x319 dereferences an iterator returned by findKey without checking whether it equals end(). The crash requires a user to process the file with the less common -p t or -P t translated-output option and interrupts only that Exiv2 process.

CVSS severity4.7
Medium
EPSS probability0.99%
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 Exiv2 0.27.4 and earlier allows local users to crash the utility via a crafted image. During interpreted metadata printing, Exiv2::Internal::resolveLens0x319 dereferences an iterator returned by findKey without checking whether it equals end(). The crash requires a user to process the file with the less common -p t or -P t translated-output option and interrupts only that Exiv2 process.

The record

CVE
CVE-2021-37615
Published
Aug 9, 2021
Updated
Aug 4, 2024
Vendor
Exiv2
Product
Exiv2
Classifications
CWE-476, T1204.002
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-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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