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CVE Record

CVE-2021-32438: The gf_media_export_filters function in GPAC 1.0.1 allows attackers to cause a denial of service (NULL poin...

The gf_media_export_filters function in GPAC 1.0.1 allows attackers to cause a denial of service (NULL pointer dereference) via a crafted file in the MP4Box command.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-32438 is a GPAC 1.0.1 MP4Box file-processing flaw that can crash the tool when it handles a crafted media file. The business risk is service disruption in systems that automatically analyze, transcode, or package untrusted media. The public record does not provide CVSS, broad affected-version data, or active exploitation evidence.

Executive priority

Prioritize remediation for media-processing environments that accept customer, partner, or internet-supplied files. For general endpoints without GPAC/MP4Box use, urgency is lower. The lack of CVSS and active exploitation evidence limits certainty, but automated untrusted-file processing raises operational risk.

Technical view

The CVE describes a NULL pointer dereference in gf_media_export_filters reachable through MP4Box processing of a crafted file in GPAC 1.0.1. Impact is denial of service. The referenced GPAC issue and commit indicate the bug was addressed upstream, but the bundle does not name a fixed release version.

Likely exposure

Exposure is most likely where GPAC 1.0.1 or MP4Box processes untrusted media files, especially automated media pipelines. Systems that do not run GPAC or only process trusted local media are less likely exposed based on the provided evidence.

Exploitation context

The source bundle states denial of service via a crafted file. It does not include exploit-in-the-wild reporting, KEV listing, exploit maturity, authentication context, or remote service exposure details. Treat exploitation status as unconfirmed.

Researcher notes

The record is narrow: GPAC 1.0.1, MP4Box, gf_media_export_filters, NULL pointer dereference, denial of service. No CWE, CPE, CVSS, fixed release, or exploitation data is present in the bundle. Avoid extrapolating to other GPAC versions without vendor confirmation.

Mitigation direction

  • Inventory GPAC and MP4Box usage, especially version 1.0.1.
  • Check GPAC vendor guidance for the fixed release containing the referenced commit.
  • Upgrade or rebuild from a vendor-supported fixed version.
  • Restrict automated processing of untrusted media until remediation is complete.
  • Run media parsing workloads with least privilege and process isolation.

Validation and detection

  • Confirm whether GPAC or MP4Box is installed in production or CI systems.
  • Identify services that automatically process externally supplied media files.
  • Verify installed GPAC versions against vendor fixed-release guidance.
  • Confirm patched source includes the referenced upstream commit.
  • Review crash reports for MP4Box denial-of-service symptoms.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-32438 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.