CVE-2019-8789

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-12-18 · updated 2026-06-17
Weakness: CWE-59

Description

A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in iOS 13.2 and iPadOS 13.2, macOS Catalina 10.15.1. Parsing a maliciously crafted iBooks file may lead to disclosure of user information.

Affected products

Apple iPadOS: before 13.2 — fixed in 13.2
Apple Iphone Os: before 13.2 — fixed in 13.2
macOS: before 10.15.1 — fixed in 10.15.1

How to fix

Upgrade to a fixed version: Apple iPadOS 13.2; Apple Iphone Os 13.2; macOS 10.15.1. Check the vendor advisory for mitigations.

References

https://support.apple.com/HT210721
https://support.apple.com/HT210722
https://support.apple.com/HT210721
https://support.apple.com/HT210722

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