Security readout for executives and security teams
Plain-English summary
Bento4 1.6.0-638 contains a null pointer dereference that can crash processing during descriptor inspection. The known impact is denial of service, not data theft or code execution, based on the provided record. Business urgency depends on whether the organization uses Bento4 to process untrusted media files.
Executive priority
Treat this as a targeted availability risk. Prioritize remediation where Bento4 processes customer-supplied or internet-sourced media. Lower priority if Bento4 is absent, unused, or limited to trusted internal files.
Technical view
The issue is reported in AP4_DescriptorListInspector::Action in Ap4Descriptor.h:124 for Bento4 1.6.0-638. The CVE describes a null pointer reference demonstrated by GPAC that can trigger denial of service. No CVSS score, CWE, patch detail, or affected downstream products are provided.
Likely exposure
Exposure is most likely in services, tools, or pipelines that use Bento4 1.6.0-638 to parse or inspect media files from untrusted sources. The source bundle does not identify affected downstream products or deployment patterns.
Exploitation context
The source bundle does not report active exploitation, and KEV is false. The public description supports a denial-of-service crash scenario only. Evidence is incomplete for exploit maturity, prevalence, and fixed versions.
Researcher notes
The record lacks CVSS, CWE, CPEs, and remediation details. Analysis should remain bounded to Bento4 1.6.0-638 and the named descriptor inspection function unless additional vendor evidence expands scope.
Mitigation direction
- Check Bento4 vendor guidance and the linked issue for fixed versions.
- Avoid processing untrusted media with affected Bento4 builds where possible.
- Isolate media parsing services from critical business workflows.
- Apply resource limits and restart controls around media processing jobs.
Validation and detection
- Inventory direct and bundled Bento4 usage across applications and pipelines.
- Confirm whether version 1.6.0-638 is present.
- Identify workflows that parse untrusted media or descriptor data.
- Review crash logs for Bento4 descriptor inspection failures.
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-2021-40943 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/axiomatic-systems/Bento4/issues/643CVE reference · x_refsource_MISC
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.