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CVE Record

CVE-2018-4344: A memory corruption issue was addressed with improved memory handling.

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.

HighCVSS 7.8Known exploitedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-4344 is an Apple memory corruption vulnerability affecting older iOS, macOS, tvOS, and watchOS versions. Apple addressed it with improved memory handling in iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. Because CISA lists it in KEV, treat remaining legacy devices as urgent remediation targets.

Executive priority

High priority for any organization with legacy Apple devices. KEV status means remediation should be tracked, especially where outdated devices access email, corporate apps, privileged accounts, or sensitive data. Modern, fully updated Apple fleets have much lower expected exposure.

Technical view

The CVE describes CWE-119 memory corruption with CVSS 7.8. The vector is local, low complexity, no privileges required, and requires user interaction, with high confidentiality, integrity, and availability impact. The source bundle does not identify the affected component or provide exploitation mechanics.

Likely exposure

Exposure is most likely on legacy Apple devices still running versions before iOS 12, macOS Mojave 10.14, tvOS 12, or watchOS 5. Managed fleets, unmanaged BYOD, lab devices, and unsupported hardware are the main places to check.

Exploitation context

CISA KEV inclusion supports known exploitation. The provided sources do not describe exploit methods, campaigns, target sectors, or whether exploitation remains common today. Avoid assuming remote exploitation; the CVSS vector supplied is local with user interaction required.

Researcher notes

Official sources provide limited technical depth: memory corruption, affected Apple platforms, fixed OS releases, CVSS, CWE-119, and KEV status. They do not identify a component, proof of concept, patch diff, or exploitation chain, so validation should focus on version exposure and vendor advisory alignment.

Mitigation direction

  • Upgrade affected Apple devices to the fixed versions or later.
  • Use Apple support advisories to confirm exact update applicability.
  • Remove or isolate devices that cannot receive supported Apple updates.
  • Prioritize remediation for managed endpoints and BYOD with sensitive access.
  • Review MDM compliance rules for minimum OS versions.

Validation and detection

  • Inventory Apple devices and record exact OS versions.
  • Flag iOS versions before 12 and macOS versions before Mojave 10.14.
  • Check tvOS devices before 12 and watchOS devices before 5.
  • Verify MDM or endpoint telemetry confirms successful updates.
  • Document unsupported devices and compensating access restrictions.
Prepared
Confidence
high
Sources
7

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.

cwe · low confidence lookup

CWE-119: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2018-4344 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
7.8 (3.1)
Known Exploited
Yes
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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
6Source links

CISA KEV status

Status
Known exploited
Source
CISA / ADP
Date added
Not provided

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
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2018-4344Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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
n/aiOS, macOS, tvOS, watchOSVersions prior to: iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5Listed
Weakness

CWE details

CWE-119

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