dbcve.org
IpadosOperating system · Apple

CVE-2020-9931

HIGH · 7.5 CVSS v3.1 Published 2020-10-16
Fix available
A fix is available. Upgrade to 13.6 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
A denial of service issue was addressed with improved input validation. This issue is fixed in iOS 13.6 and iPadOS 13.6. A remote attacker may cause an unexpected application termination.

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 a denial of service vulnerability in iOS/iPadOS where improper input validation allows a remote attacker to cause unexpected application termination. The issue is fixed in iOS 13.6 and iPadOS 13.6 through improved input validation controls.

MitigationUpgrade affected iOS devices to version 13.6 or later to remediate this vulnerability. Organizations should ensure mobile device management (MDM) policies enforce minimum OS versions.

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:< 13.6
Iphone OsOperating system
Affected:< 13.6

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
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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. Check iOS version on device
    Go to Settings > General > About on the iPhone or iPad and look at the 'Version' field
    Affected if The version number is less than 13.6 (for example, 13.5, 13.4, etc.)
  2. Check iPadOS version on device
    Go to Settings > General > About on the iPad and look at the 'Version' field
    Affected if The version number is less than 13.6 (for example, 13.5, 13.4, etc.)
  3. Check version via MDM or Apple Configurator
    Use your mobile device management console or Apple Configurator to query the device for its iOS/iPadOS version
    Affected if The reported OS version is below 13.6
  4. Identify all affected devices
    Export a list of all iOS and iPadOS devices in your inventory and compare each version to 13.6
    Affected if Any device runs iOS or iPadOS version 13.5 or earlier

A device is affected if it runs iOS or iPadOS version 13.5 or earlier; version 13.6 and later are not vulnerable.

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 13.6 or later
Fixed in 13.6
Interim mitigation

Upgrade affected iOS devices to version 13.6 or later to remediate this vulnerability. Organizations should ensure mobile device management (MDM) policies enforce minimum OS versions.

Fix this in Ipados Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $890
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,424.

Scan for this in your stack

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dbcve dependency scanner

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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-2020-9931 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