PT-2020-20797 · Apple · Apple Macos+4

Insu_Yun_En + 2 · Published 2020-05-28 · Updated 2023-01-09 · CVE-2020-9839

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions macOS versions prior to 10.15.5 iOS versions prior to 13.5 iPadOS versions prior to 13.5 tvOS versions prior to 13.4.5 watchOS versions prior to 6.2.5

Description A race condition was addressed with improved state handling, which may allow an application to gain elevated privileges. This issue was exploited in real-world incidents, such as the Pwn2Own event, where a Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability was demonstrated in Apple macOS.

Recommendations For macOS versions prior to 10.15.5, update to macOS 10.15.5 or later. For iOS versions prior to 13.5, update to iOS 13.5 or later. For iPadOS versions prior to 13.5, update to iPadOS 13.5 or later. For tvOS versions prior to 13.4.5, update to tvOS 13.4.5 or later. For watchOS versions prior to 6.2.5, update to watchOS 6.2.5 or later.

Exploit

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2020-9839

ZDI-20-681

Affected Products

Ios

Ipados

Apple Macos

Tvos

Watchos

References · 9

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/osx/local/cfprefsd_race_condition.rb · Exploit
• https://support.apple.com/HT211168 · Vendor Advisory
• https://support.apple.com/HT211171 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-9839 · Vendor Advisory
• https://support.apple.com/HT211175 · Vendor Advisory
• https://support.apple.com/HT211170 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-9839 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-20-681 · Security Note
• https://t.me/cybersecuritytechnologies/1712 · Telegram Post