Security readout for executives and security teams
Plain-English summary
CVE-2021-40944 is a denial-of-service flaw in GPAC MP4Box 1.1.0. A crafted or problematic media file can trigger a null pointer crash while packet data is handled. The main business risk is disruption to services that automatically process untrusted media.
Executive priority
Treat this as a focused availability risk. Prioritize remediation where GPAC processes customer-supplied or internet-sourced media, because a crash could interrupt automated media workflows.
Technical view
The CVE describes a null pointer reference in GPAC's gf_filter_pid_get_packet function in src/filter_core/filter_pid.c around line 5394. The reported impact is denial of service. The source bundle does not provide CVSS, CWE, CPE, or detailed affected-version ranges beyond MP4Box 1.1.0.
Likely exposure
Exposure is most likely in media processing workflows using GPAC MP4Box 1.1.0, especially automated conversion, packaging, validation, or ingestion pipelines that accept external files.
Exploitation context
The source bundle says the issue was demonstrated by GPAC and can cause denial of service. It is not listed as KEV, and the provided sources do not support active exploitation claims.
Researcher notes
Evidence is limited. The CVE record names MP4Box 1.1.0 and a specific GPAC function, but does not include CVSS, CWE, CPE, or exploit maturity details. Avoid broad product claims without confirming local package versions.
Mitigation direction
- Inventory systems and containers using GPAC MP4Box.
- Check whether MP4Box 1.1.0 is present.
- Follow GPAC and Debian DSA-5411 guidance for updates.
- Limit untrusted media processing until remediation is confirmed.
- Run media tooling in isolated, resource-limited environments.
Validation and detection
- Confirm installed GPAC and MP4Box versions.
- Review SBOMs, package manifests, and container images.
- Check Debian systems against DSA-5411 applicability.
- Review crash logs from media processing services.
- Verify updated packages are deployed in production.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-40944 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/gpac/gpac/issues/1906CVE reference
- DSA-5411CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.