CVE-2020-3840

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-02-27 · updated 2026-06-17
Weakness: CWE-119

Description

An off by one issue existed in the handling of racoon configuration files. This issue was addressed through improved bounds checking. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1. Loading a maliciously crafted racoon configuration file may lead to arbitrary code execution.

Affected products

Apple iPadOS: before 13.3.1 — fixed in 13.3.1
Apple Iphone Os: before 13.3.1 — fixed in 13.3.1
macOS: before 10.15.3 — fixed in 10.15.3
Apple tvOS: before 13.3.1 — fixed in 13.3.1

How to fix

Upgrade to a fixed version: Apple iPadOS 13.3.1; Apple Iphone Os 13.3.1; macOS 10.15.3; Apple tvOS 13.3.1. Check the vendor advisory for mitigations.

References

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