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CVE Record

CVE-2021-40574: The binary MP4Box in Gpac from 0.9.0-preview to 1.0.1 has a double-free vulnerability in the gf_text_get_ut...

The binary MP4Box in Gpac from 0.9.0-preview to 1.0.1 has a double-free vulnerability in the gf_text_get_utf8_line function in load_text.c, which allows attackers to cause a denial of service, even code execution and escalation of privileges.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

MP4Box in GPAC has a memory safety flaw that can crash the tool and may allow stronger impact. Business risk is highest where MP4Box processes untrusted media or text-derived content automatically, such as upload pipelines, transcoders, or batch media workflows.

Executive priority

Treat this as a high-priority hygiene fix for media-processing systems. It is not confirmed actively exploited, but the potential impact and common use of MP4Box in file pipelines justify timely remediation.

Technical view

CVE-2021-40574 is a double-free in GPAC MP4Box, in gf_text_get_utf8_line within load_text.c. The source description lists GPAC 0.9.0-preview through 1.0.1 and reports denial of service, possible code execution, and possible privilege escalation.

Likely exposure

Exposure is likely limited to hosts running vulnerable GPAC/MP4Box versions, especially where MP4Box handles attacker-supplied or externally sourced files. The bundle does not identify broader affected products or CPEs.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation evidence. Public issue and commit references indicate a real reported bug and fix history, but exploit status is not established in the bundle.

Researcher notes

Evidence is strongest for the affected function, affected GPAC range, upstream issue, upstream commit, and Debian advisory. The bundle lacks CVSS, CWE, CPEs, exploit telemetry, and exact fixed release naming outside the referenced commit and advisory.

Mitigation direction

  • Upgrade GPAC/MP4Box using vendor guidance or a release containing the referenced fix commit.
  • Apply Debian security updates where GPAC is installed from Debian packages.
  • Restrict MP4Box processing of untrusted files until vulnerable versions are removed.
  • Run MP4Box with least privilege in automated media processing environments.

Validation and detection

  • Inventory GPAC and MP4Box versions across servers, containers, and build images.
  • Flag GPAC 0.9.0-preview through 1.0.1 as vulnerable based on the CVE description.
  • Review upload, transcoding, and batch jobs for MP4Box use on external files.
  • Confirm vendor package updates or the referenced upstream fix are present.
Prepared
Confidence
medium
Sources
7

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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ATT&CK lookup starting points

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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-40574 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
5Source 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.