Security readout for executives and security teams
Plain-English summary
CVE-2021-35307 is a denial-of-service issue in Bento4 through v1.6.0-636. A crafted input can trigger a NULL pointer dereference and crash the affected processing component. The main business risk is service disruption where Bento4 processes untrusted files.
Executive priority
Treat this as a targeted availability risk. Prioritize remediation where Bento4 supports customer-facing upload, media ingestion, or automated processing workflows.
Technical view
The CVE identifies a NULL pointer dereference in AP4_DescriptorFinder::Test in Core/Ap4Descriptor.h in Bento4 through v1.6.0-636. The disclosed impact is denial of service. The source bundle does not provide CVSS, CWE, patch details, or confirmed exploit activity.
Likely exposure
Exposure is most likely in applications, pipelines, or services that use Bento4 through v1.6.0-636 and accept files or media from untrusted users or partners.
Exploitation context
The sources describe a denial-of-service condition only. There is no KEV listing and no cited evidence of active exploitation in the provided source bundle.
Researcher notes
Evidence is limited to the CVE description and linked GitHub issue reference. No CVSS vector, CWE mapping, exploit status, or fix version is provided in the source bundle.
Mitigation direction
- Inventory Bento4 usage and deployed versions.
- Check vendor or project guidance for fixed releases or patches.
- Restrict untrusted file processing until remediation is confirmed.
- Run Bento4 processing in isolated, restartable worker environments.
- Add monitoring for repeated crashes during file ingestion.
Validation and detection
- Confirm whether Bento4 is present in production or CI images.
- Identify any version at or before v1.6.0-636.
- Review services that pass untrusted input to Bento4.
- Check crash logs for AP4_DescriptorFinder or descriptor parsing failures.
- Verify remediation against vendor or project release notes.
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-2021-35307 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/616CVE 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.