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CVE Record

CVE-2018-4378: A memory corruption issue was addressed with improved validation.

A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-4378 is an Apple memory corruption vulnerability fixed by improved validation. It affected older iOS, tvOS, watchOS, Safari, iTunes for Windows, and iCloud for Windows versions. The sources do not provide CVSS, CWE, impact details, or active exploitation evidence.

Executive priority

Prioritize as a legacy exposure cleanup item unless your environment still runs the affected versions. The lack of severity and exploitation data prevents stronger urgency, but outdated Apple client software should not remain unmanaged.

Technical view

Apple describes the issue only as memory corruption addressed with improved validation. Affected versions are before iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, and iCloud for Windows 7.8. No technical root cause, attack vector, or proof-of-concept detail is provided in the bundle.

Likely exposure

Exposure is most likely limited to legacy Apple devices, Safari installations, or Windows systems still running iTunes or iCloud below the fixed versions. Modern managed fleets are less likely exposed if standard updates have been applied.

Exploitation context

The bundle does not show CISA KEV listing or other cited evidence of active exploitation. Apple’s public wording does not describe whether remote code execution, local compromise, or denial of service was possible.

Researcher notes

The public record is sparse: no CVSS vector, CWE, exploitability description, or affected component detail is included. Analysis should avoid inferring impact beyond Apple’s memory corruption statement and fixed-version list.

Mitigation direction

  • Upgrade iOS to 12.1 or later where applicable.
  • Upgrade tvOS to 12.1 or later where applicable.
  • Upgrade watchOS to 5.1 or later where applicable.
  • Upgrade Safari to 12.0.1 or later.
  • Upgrade iTunes to 12.9.1 and iCloud for Windows to 7.8 or later.
  • Check current Apple guidance for unsupported product versions.

Validation and detection

  • Inventory devices and endpoints for the affected Apple products.
  • Verify installed versions against the fixed-version thresholds.
  • Confirm Windows endpoints do not retain legacy iTunes or iCloud installations.
  • Review MDM or endpoint management reports for update compliance.
  • Document exceptions for systems that cannot be upgraded.
Prepared
Confidence
medium
Sources
8

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

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CVE-2018-4378 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aiOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for WindowsVersions prior to: iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8Listed
Weakness

CWE details

No CWE listed

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