CVE-2021-44920Public exploit

Application crash via unvalidated ES descriptor type

Published Dec 21, 2021 · Updated Aug 4, 2024

Invalid memory address dereference in GPAC 1.1.0 allows attackers to crash MP4Box by processing a crafted media file. The dump_od_to_saf function in src/scene_manager/scene_dump.c treats the first object-descriptor entry as a GF_ESD and dereferences its fields after checking only for null, not the expected GF_ODF_ESD_TAG. Exploitation requires MP4Box to process attacker-controlled input with the -lsr option and interrupts only that application process.

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

Invalid memory address dereference in GPAC 1.1.0 allows attackers to crash MP4Box by processing a crafted media file. The dump_od_to_saf function in src/scene_manager/scene_dump.c treats the first object-descriptor entry as a GF_ESD and dereferences its fields after checking only for null, not the expected GF_ODF_ESD_TAG. Exploitation requires MP4Box to process attacker-controlled input with the -lsr option and interrupts only that application process.

The record

CVE
CVE-2021-44920
Published
Dec 21, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, 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

5.5Canonical UbuntuCVSS: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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1204.002Malicious 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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