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Iphone OsOperating system · Apple

CVE-2016-7643

HIGH · 8.1 CVSS v3.0 Published 2017-02-20
Fix available
A fix is available. Upgrade to after 10.12.1 or later.
See remediation →
88/100
Remediation priority · High
Remotely reachable 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
An issue was discovered in certain Apple products. iOS before 10.2 is affected. macOS before 10.12.2 is affected. watchOS before 3.1.3 is affected. The issue involves the "ImageIO" component. It allows remote attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and application crash) via a crafted web site.

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 · high confidence

An out-of-bounds read vulnerability in the ImageIO component of iOS, macOS, and watchOS allows remote attackers to read process memory or crash applications by tricking users into visiting crafted malicious websites.

MitigationApply the vendor-supplied security updates: iOS 10.2 or later, macOS 10.12.2 or later, and watchOS 3.1.3 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
Iphone OsOperating system
Affected:<= 10.1.1
Mac Os XOperating system
Affected:<= 10.12.1
WatchosOperating system
Affected:<= 2.2.2

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
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

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. Identify your device operating system
    Determine whether the device runs iOS, macOS, or watchOS. For iOS check Settings > General > About. For macOS check Apple menu > About This Mac. For watchOS check the Watch app on paired iPhone.
    Affected if Device runs iOS, macOS, or watchOS
  2. Check installed iOS version
    On iOS device go to Settings > General > About and note the Version number.
    Affected if iOS version is 10.1.1 or earlier
  3. Check installed macOS version
    On Mac go to Apple menu > About This Mac and note the version number displayed.
    Affected if macOS version is 10.12.1 or earlier (versions display as like 10.12.1, 10.12.0, etc.)
  4. Check installed watchOS version
    On paired iPhone open Watch app, go to My Watch > General > About and note the watchOS version.
    Affected if watchOS version is 2.2.2 or earlier

You are affected if your device runs iOS 10.1.1 or earlier, macOS 10.12.1 or earlier, or watchOS 2.2.2 or earlier, since the ImageIO vulnerability exists in those versions and can be triggered by visiting malicious websites.

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.

From vendor data
Upgrade available Upgrade to a release after 10.12.1
Interim mitigation

Apply the vendor-supplied security updates: iOS 10.2 or later, macOS 10.12.2 or later, and watchOS 3.1.3 or later.

Fix this in Iphone Os Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2016-7643 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