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IpadosOperating system · Apple

CVE-2020-9827

HIGH · 7.5 CVSS v3.1 Published 2020-06-09
Fix available
A fix is available. Upgrade to 6.2.5 / 10.15.5 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 13.5 and iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, watchOS 6.2.5. A remote attacker may be able to cause a denial of service.

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

A remote denial of service vulnerability in Apple operating systems (iOS, iPadOS, macOS, tvOS, watchOS) was addressed with improved input validation. A remote attacker could cause a denial of service by sending specially crafted input to the affected device.

MitigationUpdate affected Apple devices to iOS 13.5/iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, or watchOS 6.2.5 or later 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:< 13.5
Iphone OsOperating system
Affected:< 13.5
Mac Os XOperating system
Affected:< 10.15.5
TvosOperating system
Affected:< 13.4.5
WatchosOperating system
Affected:< 6.2.5

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
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. Identify the Apple device type and operating system
    Determine whether the device is an iPhone, iPad, Mac, Apple TV, or Apple Watch. This can be done via system settings on the device or device management consoles for enterprise environments.
    Affected if The device runs any of the affected Apple operating systems (iOS, iPadOS, macOS, tvOS, watchOS)
  2. Check the installed iOS or iPadOS version
    On the device, go to Settings > General > About and note the version number. For bulk checking, use mobile device management (MDM) tools or Apple Configurator to query device OS versions.
    Affected if The version is below 13.5 on iPhone or iPad devices
  3. Check the installed macOS version
    Click the Apple menu > About This Mac. The version number appears below the macOS name. For remote checking, use commands like 'sw_vers' in Terminal or query via MDM/enterprise management tools.
    Affected if The version is below 10.15.5 on Mac computers
  4. Check the installed tvOS version
    Go to Settings > General > About > Version on Apple TV. For managed devices, query via MDM or Apple School/Business Manager.
    Affected if The version is below 13.4.5 on Apple TV devices
  5. Check the installed watchOS version
    On Apple Watch, go to Settings > General > About and view the version. On the paired iPhone, open the Watch app > General > About. For enterprise deployment, query via MDM.
    Affected if The version is below 6.2.5 on Apple Watch devices
  6. Assess network exposure of affected devices
    Review network access controls and firewall rules to determine if these devices are reachable from untrusted networks. This vulnerability can be exploited remotely, so devices with direct internet exposure or accessible from less-trusted network segments are at higher risk.
    Affected if The device is network-accessible from external or untrusted networks in addition to being on an affected version

A user is affected if any Apple device on their network (iPhone, iPad, Mac, Apple TV, or Apple Watch) runs an OS version below the thresholds (iOS/iPadOS 13.5, macOS 10.15.5, tvOS 13.4.5, watchOS 6.2.5) and is reachable over the network.

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 6.2.5 / 10.15.5 / 13.4.5 or later
Fixed in 6.2.510.15.513.4.5
Interim mitigation

Update affected Apple devices to iOS 13.5/iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, or watchOS 6.2.5 or later versions.

Fix this in Ipados Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
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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-2020-9827 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