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CVE-2020-3894· NVD / CVE Program· CNA apple

A race condition was addressed with additional validation.

A race condition was addressed with additional validation. This issue is fixed in iOS 13.4 and iPadOS 13.4, tvOS 13.4, Safari 13.1, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, iCloud for Windows 7.18. An application may be able to read restricted memory.

LowCVSS 3.1 · v3.1—No exploit Fix available
Published
Apr 1, 2020
Updated
Jun 16, 2026
EPSS
1.1% · 65th percentile
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Report tools

JSON

Action score

12

Monitor

Low priority for now.

CVSS
12 / 40 · 3.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

Affected systems

VendorProduct
appleicloud
appleitunes
applesafari
appleipad os
appleiphone os
appletvos

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apple icloudbefore 10.9.3
  • apple ipad osbefore 13.4
  • apple iphone osbefore 13.4
  • apple itunesbefore 12.10.5
  • apple safaribefore 13.1
  • apple tvosbefore 13.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apple). Independent of NVD's CPE analysis and usually ahead of it.

  • Apple iCloud for Windows

    • unspecified and later · before iCloud for Windows 10.9.3affected

  • Apple iCloud for Windows (Legacy)

    • unspecified and later · before iCloud for Windows 7.18affected

  • Apple iOS

    • unspecified and later · before iOS 13.4 and iPadOS 13.4affected

  • Apple iTunes for Windows

    • unspecified and later · before iTunes for Windows 12.10.5affected

  • Apple Safari

    • unspecified and later · before Safari 13.1affected

  • Apple tvOS

    • unspecified and later · before tvOS 13.4affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10webkit2gtkbefore 2.28.2-2~deb10u12.28.2-2~deb10u1
Debian:12webkit2gtkbefore 2.28.0-22.28.0-2
Debian:12wpewebkitbefore 2.28.0-12.28.0-1
SUSE:Linux Enterprise High Performance Computing 15-ESPOSwebkit2gtk3before 2.34.3-3.92.12.34.3-3.92.1

Same product

apple: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-8506A type confusion issue was addressed with improved memory handling.KEV
    70This week
  • CVE-2020-27932A type confusion issue was addressed with improved state handling.KEV
    64This week
  • CVE-2020-9850A logic issue was addressed with improved restrictions.
    62This week
  • CVE-2019-8600A memory corruption issue was addressed with improved input validation.
    45Plan
  • CVE-2019-8746An out-of-bounds read was addressed with improved input validation.
    40Plan
  • CVE-2020-9895A use after free issue was addressed with improved memory management.
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:webkit2gtk2.28.0-2 · Debian:12Package registry (OSV)
debian:wpewebkit2.28.0-1 · Debian:12Package registry (OSV)
suse:webkit2gtk32.34.3-3.92.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOSPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records