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SafariWeb browser · Apple

CVE-2017-2396

HIGH · 8.8 CVSS v3.0 Published 2017-04-02
Fix available
A fix is available. Upgrade to after 10.2.1 or later.
See remediation →
95/100
Remediation priority · Urgent
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 10.3 is affected. Safari before 10.1 is affected. tvOS before 10.2 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption 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

Memory corruption vulnerability in WebKit allows remote attackers to execute arbitrary code or cause denial of service via crafted malicious web content. Affects iOS before 10.3, Safari before 10.1, and tvOS before 10.2.

MitigationApply vendor patches: update iOS to 10.3+, Safari to 10.1+, and tvOS to 10.2+. Until patched, avoid visiting untrusted websites.

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
SafariWeb browser
Affected:<= 10.0.3
Iphone OsOperating system
Affected:<= 10.2.1
TvosOperating system
Affected:<= 10.1.1

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
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 which Apple platform you are running
    Determine if the device is running Safari on macOS, iOS (iPhone/iPad), or tvOS (Apple TV). The CVE affects Safari, iOS, and tvOS specifically.
    Affected if The device runs any of these three Apple platforms.
  2. Check Safari version on macOS
    Open Safari, go to Safari menu > About Safari. The version number is displayed next to Safari.
    Affected if Safari version is 10.0.3 or lower.
  3. Check iOS version on iPhone or iPad
    Open Settings app > General > About. Look for the 'Version' field which shows the iOS version number.
    Affected if iOS version is 10.2.1 or lower.
  4. Check tvOS version on Apple TV
    Open Settings app > General > About. Look for the 'Version' field which shows the tvOS version number.
    Affected if tvOS version is 10.1.1 or lower.
  5. Confirm WebKit is in use
    Verify that Safari is the browser being used, since this vulnerability exists in the WebKit rendering engine that Safari uses.
    Affected if Safari with WebKit is the active browser.

You are affected if you are running Safari 10.0.3 or earlier, iOS 10.2.1 or earlier, or tvOS 10.1.1 or earlier.

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 10.2.1
Interim mitigation

Apply vendor patches: update iOS to 10.3+, Safari to 10.1+, and tvOS to 10.2+. Until patched, avoid visiting untrusted websites.

Fix this in Safari Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

Scan for this in your stack

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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-2017-2396 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