Iphone OsOperating system · Apple

CVE-2016-1842

HIGH · 7.5 CVSS v3.0 Published 2016-05-20
Fix available
A fix is available. Upgrade to after 10.11.4 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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
MapKit in Apple iOS before 9.3.2, OS X before 10.11.5, and watchOS before 2.2.1 does not use HTTPS for shared links, which allows remote attackers to obtain sensitive information by sniffing the network for HTTP traffic.

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

MapKit in Apple iOS before 9.3.2, OS X before 10.11.5, and watchOS before 2.2.1 fails to use HTTPS for shared links, allowing remote attackers to intercept sensitive location or user data by sniffing network traffic for unencrypted HTTP requests.

MitigationUpdate all affected Apple devices (iOS, OS X, watchOS) to the patched versions (iOS 9.3.2+, OS X 10.11.5+, watchOS 2.2.1+) to enforce HTTPS for MapKit shared links.

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:<= 9.3.1
Mac Os XOperating system
Affected:<= 10.11.4
WatchosOperating system
Affected:<= 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
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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 iOS version on iPhone or iPad
    Go to Settings > General > About > Version, or use Xcode device management, or check the device inventory if managed
    Affected if The version listed is 9.3.1 or lower (any iOS version <= 9.3.1)
  2. Check macOS version on Mac
    Click Apple menu > About This Mac, or run 'sw_vers' in Terminal
    Affected if The version listed is 10.11.4 or lower (any OS X version <= 10.11.4)
  3. Check watchOS version on Apple Watch
    Open the Watch app on paired iPhone > My Watch > About, or check Settings > General > About on the watch itself
    Affected if The version listed is 2.2 or lower (any watchOS version <= 2.2)
  4. Identify MapKit usage in enterprise or third-party apps (optional context)
    Review any custom or internal apps that use MapKit for shared links or location sharing functionality
    Affected if Apps using MapKit shared links feature are present on a device running an affected OS version

If any iOS device runs version 9.3.1 or lower, any Mac runs OS X 10.11.4 or lower, or any Apple Watch runs watchOS 2.2 or lower, the MapKit vulnerability is present and location data could be intercepted over unencrypted HTTP.

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 10.11.4
Interim mitigation

Update all affected Apple devices (iOS, OS X, watchOS) to the patched versions (iOS 9.3.2+, OS X 10.11.5+, watchOS 2.2.1+) to enforce HTTPS for MapKit shared links.

Fix this in Iphone Os Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing4.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,720
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Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2016-1842 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

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-2016-1842 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