CVE-2021-45289Public exploit

Process termination via zero-size encryption metadata

Published Dec 21, 2021 · Updated Aug 4, 2024

Denial of service in GPAC 1.0.1 allows context-dependent attackers to terminate MP4Box by supplying a crafted ISOBMFF file. The senc_Parse function in src/isomedia/box_code_drm.c continues parsing a Sample Encryption Box when both key information and its IV size are absent, instead of rejecting the invalid file. A user or consuming workflow must process the file with MP4Box; the observed failure ends the process with SIGKILL without reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in GPAC 1.0.1 allows context-dependent attackers to terminate MP4Box by supplying a crafted ISOBMFF file. The senc_Parse function in src/isomedia/box_code_drm.c continues parsing a Sample Encryption Box when both key information and its IV size are absent, instead of rejecting the invalid file. A user or consuming workflow must process the file with MP4Box; the observed failure ends the process with SIGKILL without reported confidentiality or integrity impact.

The record

CVE
CVE-2021-45289
Published
Dec 21, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 21, 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?

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

4.3NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
5.5NVDCVSS: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

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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