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CVE Record

CVE-2023-42876: The issue was addressed with improved bounds checks.

The issue was addressed with improved bounds checks. This issue is fixed in macOS Sonoma 14. Processing a file may lead to a denial-of-service or potentially disclose memory contents.

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2023-42876 is an Apple macOS issue where opening or processing a crafted file could crash the system component involved or potentially expose memory contents. Apple says it was fixed with improved bounds checks in macOS Sonoma 14. The sources do not identify exact vulnerable macOS versions beyond macOS being affected.

Executive priority

Treat this as a high-priority endpoint patching item, especially for users who receive files from external parties. There is no sourced evidence of active exploitation, but the potential memory disclosure and denial-of-service impact justify timely remediation.

Technical view

The CVSS 3.1 vector is local, low complexity, no privileges required, and user interaction required. Impact is high confidentiality and high availability, with no integrity impact. Apple describes the root fix as improved bounds checks, suggesting an out-of-bounds memory handling flaw during file processing.

Likely exposure

Exposure is most likely on macOS endpoints that process untrusted files and have not received the Apple release containing the fix. The bundle does not specify exact affected macOS versions, device models, file types, or vulnerable components.

Exploitation context

The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. Abuse requires local file processing and user interaction according to the CVSS vector and Apple description.

Researcher notes

Evidence is limited to Apple and CVE metadata. No CWE, vulnerable component, file format, or proof-of-concept status is provided. Avoid assuming exploitability beyond the stated local, user-assisted file-processing scenario.

Mitigation direction

  • Apply Apple's fixed macOS Sonoma 14 release where applicable.
  • Review Apple advisory HT213940 for vendor-specific update guidance.
  • Prioritize managed macOS endpoints that handle untrusted external files.
  • Limit opening untrusted files until systems are confirmed updated.
  • Track Apple security updates for any affected-version clarification.

Validation and detection

  • Inventory macOS versions across managed endpoints.
  • Confirm systems are on the Apple release containing this CVE fix.
  • Map vulnerability scanner findings to CVE-2023-42876 and Apple HT213940.
  • Check endpoint management reports for update compliance gaps.
  • Document exceptions where exact affected versions cannot be determined.
Prepared
Confidence
medium
Sources
4

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

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.

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CVE-2023-42876 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.1CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H1.85.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.1High
CVSS 3.1 vector shape for CVE-2023-42876Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
ApplemacOSunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.