dbcve.org
IpadosOperating system · Apple

CVE-2021-30700

MEDIUM · 5.5 CVSS v3.1 Published 2021-09-08
Fix available
A fix is available. Upgrade to 7.5 / 11.4 or later.
See remediation →
58/100
Remediation priority · Elevated
No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. Processing a maliciously crafted image may lead to disclosure of user information.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is an information disclosure vulnerability in Apple's operating systems (macOS, tvOS, watchOS, iOS, iPadOS). The vulnerability is triggered when processing a maliciously crafted image, which can lead to disclosure of user information. It was addressed with improved input validation checks.

MitigationUpdate affected devices to macOS Big Sur 11.4 or later, tvOS 14.6 or later, watchOS 7.5 or later, iOS 14.6 or later, or iPadOS 14.6 or later.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
IpadosOperating system
Affected:< 14.6
Iphone OsOperating system
Affected:< 14.6
macOSOperating system
Affected:>= 11.0, < 11.4
TvosOperating system
Affected:< 14.6
WatchosOperating system
Affected:< 7.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check macOS version on Mac devices
    Open System Preferences > About, or run 'sw_vers' in Terminal, or run 'system_profiler SPSoftwareDataType'
    Affected if macOS version is 11.0 or higher but lower than 11.4 (e.g., 11.0, 11.1, 11.2, 11.3)
  2. Check iOS version on iPhone
    Go to Settings > General > About, or connect to computer and check in Finder/iTunes
    Affected if iOS version is lower than 14.6 (e.g., 14.5, 14.4, etc.)
  3. Check iPadOS version on iPad
    Go to Settings > General > About, or connect to computer and check in Finder/iTunes
    Affected if iPadOS version is lower than 14.6 (e.g., 14.5, 14.4, etc.)
  4. Check tvOS version on Apple TV
    Go to Settings > General > About > Version, or open the Settings app on Apple TV
    Affected if tvOS version is lower than 14.6 (e.g., 14.5, 14.4, etc.)
  5. Check watchOS version on Apple Watch
    Open the Watch app on iPhone, go to General > About, or on Apple Watch go to Settings > General > About
    Affected if watchOS version is lower than 7.5 (e.g., 7.4, 7.3, etc.)

The device is affected if its operating system version falls within the vulnerable range: macOS 11.0-11.3, iOS/iPadOS before 14.6, tvOS before 14.6, or watchOS before 7.5.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 7.5 / 11.4 / 14.6 or later
Fixed in 7.511.414.6
Interim mitigation

Update affected devices to macOS Big Sur 11.4 or later, tvOS 14.6 or later, watchOS 7.5 or later, iOS 14.6 or later, or iPadOS 14.6 or later.

Recommended fix High confidence

iOS 14.6, iPadOS 14.6, macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5

  1. Identify the affected Apple device (iPhone, iPad, Mac, Apple TV, or Apple Watch)
  2. For iPhone/iPad: Go to Settings > General > Software Update and upgrade to iOS/iPadOS 14.6 or later
  3. For Mac: Go to System Preferences > Software Update and upgrade to macOS Big Sur 11.4 or later
  4. For Apple TV: Go to Settings > System > Software Updates and upgrade to tvOS 14.6 or later
  5. For Apple Watch: On the iPhone, open the Watch app, go to My Watch > General > Software Update and upgrade to watchOS 7.5 or later
  6. Verify the update was successful by checking the software version after completion
Caveat Major OS upgrades may have app compatibility implications; review app updates before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Ipados Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing1.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-30700 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data