Security readout for executives and security teams
Plain-English summary
Apple fixed a bug where opening a maliciously crafted USD file could expose memory contents. The issue affects Apple iOS, iPadOS, and macOS platforms before the listed security updates. No source in the bundle reports active exploitation.
Executive priority
Treat this as a patch-compliance item for Apple fleets, especially user workstations that process external files. Business urgency is moderate because impact is memory disclosure and no active exploitation is cited, but outdated endpoints remain avoidable risk.
Technical view
Apple describes CVE-2021-30929 as an out-of-bounds write addressed with improved bounds checking. The documented impact is memory disclosure when processing a maliciously crafted USD file. Fixes are listed for iOS/iPadOS 15.2, macOS Monterey 12.1, macOS Big Sur 11.6.2, and Catalina Security Update 2021-008.
Likely exposure
Likely exposure is Apple endpoints that can process USD files and have not received the listed updates. The source bundle does not specify exact vulnerable version ranges, affected component names, or third-party application trigger paths.
Exploitation context
The bundle provides a malicious-file processing scenario but no exploit maturity details. CISA KEV status is false, and the provided sources do not state active exploitation or public weaponization.
Researcher notes
Evidence is limited to Apple advisory language and CVE metadata. CVSS, CWE, exact vulnerable versions, and affected internal component are not provided in the bundle. Avoid assuming code execution; the cited impact is memory contents disclosure.
Mitigation direction
- Update iOS and iPadOS systems to 15.2 or later where applicable.
- Update macOS Monterey to 12.1 or later where applicable.
- Update macOS Big Sur to 11.6.2 or later where applicable.
- Apply Security Update 2021-008 on supported Catalina systems.
- Review current Apple guidance for unsupported or unclear platform versions.
Validation and detection
- Inventory Apple devices and compare OS versions against the fixed releases.
- Confirm managed macOS Catalina systems received Security Update 2021-008.
- Check endpoint management reports for remaining outdated iOS, iPadOS, or macOS hosts.
- Review file-handling exposure for USD files on high-risk Apple endpoints.
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-2021-30929 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://support.apple.com/en-us/HT212976CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212978CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212979CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212981CVE 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.