dbcve.org
Mac Os XOperating system · Apple

CVE-2020-3882

MEDIUM · 6.5 CVSS v3.1 Published 2020-06-09
Fix available
A fix is available. Upgrade to 10.15.5 or later.
See remediation →
72/100
Remediation priority · Elevated
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
This issue was addressed with improved checks. This issue is fixed in macOS Catalina 10.15.5. Importing a maliciously crafted calendar invitation may exfiltrate user information.

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

A vulnerability in macOS Catalina's calendar invitation parsing allows a maliciously crafted calendar invitation to exfiltrate user information when imported. The fix involved implementing improved validation checks on calendar invitation data. This is a client-side information disclosure issue exploitable through importing specially crafted .ics calendar files.

MitigationApply macOS Catalina 10.15.5 or later security update to affected systems. For enterprise environments, test and deploy the security patch through patch management infrastructure.

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
Mac Os XOperating system
Affected:< 10.15.5

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
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 macOS version
    Run 'sw_vers -productVersion' in Terminal or go to Apple menu > About This Mac
    Affected if The version shows 10.15.x but is below 10.15.5 (e.g., 10.15.0-10.15.4)
  2. Confirm macOS Catalina lineage
    Run 'uname -a' and verify the kernel is Darwin 19.x, or check System Preferences > Software Update
    Affected if System is Darwin 19.x (indicating macOS 10.15.x Catalina)
  3. Verify Calendar app presence
    Check /Applications/Calendar.app exists or run 'ls /Applications/Calendar.app'
    Affected if Calendar application is installed on the system

If the system runs macOS Catalina 10.15.x with a version lower than 10.15.5 and has the Calendar app installed, the environment is vulnerable to information disclosure via malicious .ics calendar invitations.

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 10.15.5 or later
Fixed in 10.15.5
Interim mitigation

Apply macOS Catalina 10.15.5 or later security update to affected systems. For enterprise environments, test and deploy the security patch through patch management infrastructure.

Fix this in Mac Os X Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2020-3882 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